Has anyone ever had good results using any of the plethera of ab-gadget-thingys? I do Cathe ab work on a regular basis but was wondering if anyone has tried a gadget that works well too. I'm not looking for miracle stories, just good advice on possibly adding another piece of equipment to my cache. I really do have a bad neck and don't usually have neck problems after ab work, but sometimes I do. Any ideas? Thanks, Alexis