I use both these and the longer red version for tidying instrument leads at gigs and they never disappoint. Cheap alternatives are, in my experience, a complete waste of money 'cos sooner or later you'll end up changing them out for Velcro. They don't leave a nasty sticky residue on the cable either.
The Velcro strip is about 8mm wide and comes in a long one-piece reel. I was able to cut parts to length as required and used them in place of carabina holders to sling a heavy item. The Velcro held firm for two days of constant use without a problem. Highly recommended.