I have something similar to the Cane Creek bar ends on my bike, and I really like them. I can't use them as much as I'd like (too heavy traffic and unpredictable behaviour of other road users) because I need to keep my hands on the brake levers a lot of the time, but when I can use them they're super comfortable. Haven't had any problems with hand numbness, and I have a 27 mile round trip commute.