Ha, I had to look that up! In short, I like them. My bike is a Ralleigh Technium that's had a bunch of new stuff thrown on, but the only thing I've done to the handlebar and brakes is keeping up with bar tape and brake pads.

The extra levers are kind of neat, I think, and they don't get in the way. I find them useful for mild, slow speed braking and mostly just on the front. When I need to really slow down, I have to use the primary levers. They really need the wheels to be true and the calipers adjusted close, because there's quite a bit of flex from these extensions and so much of the pulling force is not transmitted to the pads.