I think it was the 2005 NAMM show that I met Charles Fisher, the man behind the Off-Set pedal. That same year, the 3 Sonor pedals (Giant Steps) were unveiled. At least, that was the first year they caught "my" eye. Anyhow, I went back and forth for 3 days at the NAMM show, playing both pedals. I don't put a lot of thought into why I don't like something. Like buying a pair of shoes. Either they're confortable, or they're not. So I found the Sonor "not my cup of tea". So now, 2008 NAMM finds me actually playing a Sleishman pedal http://www.sleishman.com/html/twin_pedals/index.html
and it also, I would buy over the Sonor. Unlike the Off-Set, the Sleishman has no drive shafts, and there are +'s and -'s to that. I'll probably get one, someday, just to have one.