I have used this pads on just one 25 mile ride ride so far. Have yet to crash but the vpd works like magic when bending and punching the pad. Mine are a bit small but hoping they will stretch out a bit. On the ride I did 3000 ft of climbing all with the pads on. Great flex and did not feel overheated.
got this and love it and use it all the time. Great for commuting and for mnt biking and boarding. A little tight in space at times but the exterior storage helps with things like carrying half gallons of juice from the store. Also wish that the back had a bit of a curve to help retain shape like some of the osprey packs have