I have definitely had bad reactions to certain jelly toys. An intense burning after just a few minutes. Using a condom obviously helps, but I don't like the feel of a floppy condom on a toy, either. So, I tend to shy away from jelly toys now. Silicone remains my favorite.
@Grumpy Boy,I buy the Snugger Fit condoms from Iron Grip on Amazon. They offer some good prices on quantities of condoms from different companies. The Snugger Fit by Iron Grip is a smaller sized condom and is great for slipping over sex toys. This helps eliminate the "floppy condom syndrome" that you mentioned. You will still contend with the latex feel, however, it just won't be too loose. I bought 30 condoms for $5.00, and this makes it easy to pull one out and use on a toy when the mood strikes. Have fun! 😉