Purchased six of these, two for my husband and I, and the rest as gifts. So far everyone has been pleased with it. 
I have been using mine for lunch. I was originally worried about size based on other reviews, but I find it the perfect size. It does look small, but my normal portion fills it a little more than half way, giving room to stir. 
Like other reviews say, do not seal down the top when it is on. I just leave mine resting on top and have had no problems resealing and using as a lunch container. I love mine.