I don't use it often but find Gulp is a very effective bait in SD bays and beaches. 3 inch shrimp is a killer for shortfin corvina (our version of the sea trout/weakfish, etc.). Their sand fleas are excellent for surf-fishing CA corbina or surf perches.
Buying it in the canisters for 20 clams is the best deal and dropping swimbaits or grubs in the juice for a few days will improve your catch. They will outlast most plastics probably 2 or 3 to 1.
Just don't let the bait dry on your hook.
Berkeley is hiring some pretty good chemists.
The stuff should probably be banned from tournaments