I bought them on recommendation from a friend/guide at Dale Hollow and had no luck there but have used them since and the fish crush them. The only problem I have with them is they are not very effective in weeds due to the open hook.

Zoom Flukes has Flukes with a swim bait tail; I have found these to be very effective also. And the benefit of these is you can rig them texposed with a wide gap weighted hook.