I purchased two a while back. One I installed promptly and used for about a year. Note, this was used in a busier than average home environment, not a commercial shop, so intermittent use is accurate. The other pad sat in a cabinet waiting for it's time. After about a year and half, it's time came... and it blew apart almost instantly. The pad I had been using also blew apart, which is why I went to replace it.I have dewalt, makita and other sanders, so I feel I have a good baseline on what to expect.This pad may have it's use, but I'll try another brand if I find a need for a contour pad again. Just sayin'...