I installed it yesterday and did a 50 mile ride home from my friends house since he had a lift. So far I like it definitely helps with the roll on my 08 GS.
Also customer service was on it within hours when I emailed them on a Sunday with a question about the links since for the 08 they are sold separately.
Would be 5 stars but I haven't ridden it enough yet to make a complete eval. Probably next weekend. Want to get a few hundred miles on some twisty roads