Chef Rubber did a custom design for me and I was not happy with the results. They should have told me the design should have been enlarged for a larger truffle so you could tell what it was. Their stock designs are wonderful! Great resource for lots of items.
I've only used the Chef Rubber colors so can't give an opinion on others. But, I did have a problem with the red colors for a while. Every time I used it, lost 90% of the molded chocolates. Very frustrating to say the least. I don't know if the batch was bad, but I tried several things to get it to work with no luck.
A couple of months ago, I ordered two new bottles of red and they have worked great.
I ordered some new colors and they were a little strange. They seemed thinner, and had a really strong cocoa fragrance. All the original bottles I ordered just had kind of a neutral smell. They have worked OK, so can't really complain.
It does take a lot of trial and error with this stuff. I've found that if they are overheated, it will mess it up. Just my experience. I melt them in the microwave on medium and shake the bottles a lot.
Chef Rubber is great for a lot of items, but they are a little overpriced on molds I've noticed.