Instruct: Classify an Amazon review into positive or negative sentiment.
Query: Works great, but the lid design is weird

It's cheap and it works great. The lid is a bit weird because it only locks on when the spout is open, and you're supposed to turn it on with the spout closed - but the lid is unlocked and can pop off. I usually only have one or two cups mixing at the most so it hasn't been a problem for me, but I could see it being a problem if you're mixing a little over the max.So far, I haven't found a good chocolate to use other than the powdered variety. I tried a few different brands of dark chocolate and mint chocolates, breaking them into postage stamp sizes before tossing them in. They melt pretty good and mix evenly for the most part, but it's still too bitter to my taste. I'm going to try baking chocolate chips and hershey's kisses next, hopefully those work better.