Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Poor design, bad pressure cooker

I really wanted this pressure cooker to be the multi-cooker it promised to be. The first one I received spewed steam all over the place and the pressure relief valve did not stay in place. After using it one time, I cleaned it and the very messy counters and decided to try cooking something else. It didn't even turn on. The second one I received had similar problems, basically with the pressure relief valve. Water also built up behind the led light display. It heats unevenly, only has 1 temperature and you cannot submerge the pot. I've used pressure cookers for years and this is by far the poorest one I have ever used. That said, the customer service was great and the company refunded my money. I don't think Manttra is making these anymore, which is a good thing because it is a really bad piece of kitchen equipment. The only good thing about it is the capacity.