I have had the extensions on for about 2 months and have used them both in training and in tri events. Getting long ride positioning has taken some effort, but to no fault of the extensions. I like the curvature and feel. Some commented about weight in other reviews, with these being slightly heavier than other sets. I don't feel any noticable difference, nor see any noticable difference in my competion speed averages. I feel these have been a good interim alternative for me in competing at a reasonably competitive level without reinvesting in another tri bike this year. The set is easy to mount and easy to adjust on my Trek. I give the product an overall solid recommendation..