I have used them before. Never caught a fish on them. Does that count? I hooked up on what felt like a bass at the jetty fishing on a splasher float but the fish came off before I could land it.
flukes work great for the halibut on a carolina rig or on the drop shot. For bass, sometimes that's what they are keyed in on with a scrounger type head. In the back bays, running a weightless fluke can put a hurting on the fish at night.
I've long been told that the Zoom Flukes, white color, are one of the top lures for halibut in the Long Beach area, especially when fished with a drop shot rigging. Another winner is supposed to be the Berkley Jerk Shads in pearl white color.
I caught a tiny halibut on a white zoom fluke and darter head at crissy field a few years ago. Usually use other types of lures but clearly it does work.