The Sealer itself is great.  I am using it only for wine at the moment but my original intention was to use it for foods.  The glass containers in the sets have smaller top than the normal food containers (e.g. Pyrex).  I am guessing it is to reduce the force from the air pressure.  So the sizes of the containers are a bit weird and not useful to me at the moment.  However, I do see now the newer glass containers are flatter but with a bigger top.  I will give those a try.