I purchased a set of Vulcan Alpha Bumpers and Vulcan V-lock Change plates and have been happy with them so far. They are everything as described and reviewed by others (low bounce, accurate weight, quieter, usable indoors and outdoors on concrete, thinner profile, anchored inserts, great color flecks, seem indestructible). The only points I will add are that shipping took a while, they're always out of stock on items, customer service is good and the low odor / no odor claim is all relative. For me, I find the rubber smell quite overwhelming in a basement gym and I have been airing them out for a few months now with very little improvement. They seem very durable but only time will tell how they hold up, good thing the warranty is great. Overall a recommended buy from a good company.