Premium Portable Electric Burr Coffee Grinder - 4 Cup Automatic Conical Burr Mill with Adjustable Grind Settings for Espresso, Drip, Pour Over & French Press Coffee - USB Rechargeable Compact Coffee Bean Grinder (Red) - Perfect for Home, Office & Travel Use

I would give this device almost a B+ rating. I don't like that you need a USB to charge it. Can't they put plugs on devices like they used to!?The device is a little quirky and may stop after 45 seconds or a minute. But you can get around this by knocking and swirling the beans around in the container and starting the grind process again. You may need to do this twice. And don't put in too many beans at any time! I'd say under two scoops each time.As my close up vision isn't too good, my friend helped me find the right position on the rotator to get a decent espresso ground for the 15 Bars of pressure on my home espresso machine. So far so good. I do wonder how long this lite weight gadget and its blades will work. At some point I will likely need to buy a heavy duty burr grinder.First off, this grinder is very nice and compact.I got this to save counter space while still being able to enjoy fresh ground coffee. The grinder I received grinds the coffee beans to the right/even coarseness. Only issue I had was that the grinder would stop often before grinding all the beans. After reaching out to the seller, I was instructed to hold the power button 15 seconds to achieve a fully ground batch of coffee. I tried that and it got more of the beans but still would leave a few. Reached out to the seller again and they sent me the newer upgraded model that ground all the beans perfectly. I recommend this product especially for the customer service.Looking for a new grinder after only having this one for a few months. It would run well at first and I could get other things done while it was operating. I charge it every other use so the battery is always charged. It will run at random intervals; 5secs, 2 secs, 6 secs, 1 sec. Either the auto-shutoff needs to be fully disabled, or much better implemented.I love this grinder. It is perfect in my camper when "boondocking." I also use it at home because I like the coffee it produces. Lately though, the battery is acting funny; red blinking lights after blue indicating charging complete, very long charge cycles, even with frequent charging. And consulting the "documentation," a full 365-day warranty is touted, but there is NO contact information of any kind, even though the manufacturer says, "please contact us." If there were a path for battery replacement, either from the dealer or at home, I would jump for it. My lack of full stars in this review reflects that lack of connection to the dealer/manufacturer. Perhaps they expect Amazon to shoulder that burden?I like the size and the fact it's rechargeable. It's not very speedy and it is loud. I usually put it in the refrigerator to muffle the sound and it does auto-stop when it's done. I use it for making cold coffee and it's capacity is good for making about 14oz of that so not huge. It is easy to clean and the ceramic burrs are doing a good job of making coarse grounds.I'm an avid coffee drinker and I really enjoy grinding coffee beans.This grinder is definitely worth the price but not because of its performance more so because of its convenience.First the flaws:- It doesn't grind evenly when set to medium which is what I use for my coffee maker. It's good at grinding coarse or fine but not medium- The power button is inconveniently located where you hold the grinder, this causes to accidentally turn it on- The bean holder capacity is just too small.The good:- Battery operated and rechargeable- Quality of materials on pair with the price- Easy to use if you know what you're doingThings to pay close attention:When disassembling the unit for cleaning pay attention to 3 pieces:- the spring on the metal rod- the plastic base of the burr and- the plastic piece that screws to the rod. They are easy to looseIf you want coffee grinds as evenly as possible for a drip coffee machine, use the fine setting by turning the plastic piece all the way up and then back down about 9 clicks. When it stops turn it on again and shake it so it grinds all the beans.Update. Seven months have passed of normal every day use and the burr piece just broke in half (see picture). The battery still charging goodUPDATE:After the mechanism inside my original purchase came apart, the seller kindly replaced my machine with a newer model (I originally purchased the red cylindrical one and they sent me a black square shaped one). I am honestly really pleased and relieved with the newer model! I actually got it to make a pretty decent powdery grind for espresso. Sure there were a few stray pieces that were larger, but it was almost akin to the grind I'm able to get at work with our expensive machines. I'm really surprised something portable and so small did a decent job grinding down to a powder. Updating my rating from 2 to 5 stars because I really can't find any fault with it, especially for the price. It takes a while to grind but it's worth it to not have to buy an expensive machine when I only need a few ounces for a shot of espresso each day. Shout out to the seller for messaging me till I saw it and replacing it for me. Thank you!!----------------Definitely not for espresso grind. This is probably great if you're just looking for a medium or coarse grind for drip coffee. But even on the finest setting mine was grinding incredibly inconsistent. It's probably defective, because the hardware in the middle keeps popping up out of place. Because it's loose its letting huge pieces of coffee fall out as it's grinding. The bottom piece that the grinds fall through wobbles as it rotates so again, incredibly inconsistent. I couldn't manage to get a fine grind at all.But again, if you're just looking for a bigger size grind for regular coffee this would work for you.Sadly the 7th Feb review is 100% right. Was fantastic for quite a while then the E clip somehow came off and went through. Fortunately the burr is fine but now it won’t event grind so even if I find a replacement I can’t use it anymore. Purchased in March, can’t use it in may. Rather frustrating to be honest est over such a small piece.