I had one jelly toy, and I couldn't use it because it was too large for me at the time (I could probably use it now, but I threw it away). Aside from that, it smelled bad and was pretty greasy-feeling. In hindsight, that probably meant it was leaking pthalates, so I suppose it's a good thing I never used it.
I don't think I'll ever try another one. I'm hooked on silicone now.