I've got the double T's on mine and I notice a sizeable difference in comfort and position. They still aren't quite as ergonomic as the stock buckhorns on a Virago, but my back doesn't hurt anymore. As far as installation, it wasn't too bad. The biggest thing is removing the headlight assembly so you can get better access to the two nuts holding the risers in. The double T bars have sleeve inserts to make up for the difference in bolt diameter, but once you get them lined up and started in the hole, they slide right in. I think it took me about two hours including the mirrors and controls. The wires won't follow the shape of the bars. There isn't really enough excess of cable so I just tucked a little bit of the cable behind the corners of my speedo. I just made sure that when the bars are turned stop to stop that the wires don't rub on my tank. I like them, but everyone is different. Sorry for the lengthy post. Hope it goes smooth for you and they work out!!
Johnny