It is very small and so when you try to get a full amount of food in there, it doesn't work because the lid needs to be perfectly aligned with the base. It's really annoying and takes time to readjust, remove food, readjust again, until finally it is just right and it actually works!
Also, I have been using it for two months now and once already when it said it was working, it didn't steam. Weird.
And lastly, it is too small. You have to make food way too often. It's easy to make, but it would be better if you could get a lot more done at once.
Oh, and I feel like it's going to snap into pieces every time I wash it! It's cheaply made.