Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Worst can opener I've ever used!

This is a very fiddly can opener. I'm a techno-geek, and I couldn't figure out a way to reliably and easily lock it onto a can. My wife and mother-in-law fared no better.Also, the cutting head keeps comes off for cleaning, but it wouldn't lock in very well for actual use. It kept coming off the unit all the time.Finally, when I bought this thing, I assumed that the wall mount was a charging cradle. It's not. The wall mount is a piece of plastic. If you want to charge the thing, you've got to pull the adapter out of a drawer somewhere and leave it plugged in for a day. Definitely not anywhere near as care free as past can openers I've used that were always on, always available, and always clicked into the can relatively easily.About the only good thing I can say about it is that after you do finally get it charged and locked onto the can, it does actually open the can.Ours went into the trash after about 5 minutes of attempted use.