Bests & Worsts Reviews from Amazon

DO NOT PURCHASE. The Safety Instructions from Black Mountain clearly state "Do Not, under any circumstances, use resistance bands beyond 90 days." These bands are a scam. A product with Lifetime Warranty that is only safe to use for 90 days? Black Mountain you should be ashamed of yourselves... and so should you Amazon for even marketing their product!!! In addition, the door anchor slipped out of my locked front door with all bands at full extension striking me in the back of the neck and sending me flying to the floor. Reason: the anchor wedge is too small to adequately anchor in all door jambs. I have since purchased the Bodylastic Bands with internal safety cord, larger/stronger metal rings and fasteners, and a much larger door anchor. They also do not limit the life of their bands for only 90 days.