No, I'm not. Never heard of them until this post. 3 different friends have been using cheap panels from China w/o a problem for several years. But who knows? One would have to try them to find out their worth.
Mine are: Seimens, Carmanah, Kyocera. Hooked in pairs (series/parallel)
'04 Newmar MADP, 1100w of solar, Rubicon toad