I was going to buy similar bowls from Amazon.  I had the bowls on my wish list.  These bowls were on sale and I purchased them from All Modern.  It was a great price 40% less then on Amazon.  I have already used most of the bowls they are very nice and do their  job.  I would have given these bowls a 5 star rating except for the product sticker in each bowl and a sticker on bottom of each bowl.  They were a pain to get off.  I used boiling water several times and had to really scrub to get the adhesive removed.

Pros: Can be use as a double boiler, for chocolate and hollidaise sauce.  The shape of the bowls allow you to whisk while you are double boiling unlike a classic double boiler.
Cons: These bowls have product stickers on them that were very hard to get off.  I had to use boiling water several times prior to being able to use bowls.  It was a chore to get the stupid stickers off.  Other con made in China.