I haven't tried them, but they look very, very similar to the Symtecs. I have the Symtecs and they are excellent. I put them under the grips (Progrips 714's) - not between the grips and grip puppies.
Also, Symtec offers a choice of switches. A toggle like the Aerostich (which looks hideous in the picture IMHO), or a rocker. Check out how the rocker looks with no drilling or hassle. It is held on with a coated cable P Clamp from Ace Hardware (about $1.50).
2007 DL650 with Givi windscreen, Madstad, Givi E33 topcase, GIPro, Symtecs under Progrips 714's, Sargent seat, Richland Rick fork brace, RacerATB corrected gauge face, Stebel Black Max, Aprilia mirrors, Suzuki Hand Guards, Battle Wings, Shermworks Open Road Stand.