I use this strap with my bass guitar, gigging every weekend with my band.
Pros:
1. Price, most affordable strap, cheaper than most products available in local stores.
2. Durability, has survived many gigs. The material is robust and I have great faith in it over the fabric usually used for cheap guitar straps.
3. Break-ability, this strap does not contain any plastic parts, usually the first item to break on a standard strap. For me this is it's biggest selling point. The tie wrap used to secure the neck is very durable and I have great faith this strap will last me through many more gigs, it is truly one of the great Thomann buys available. I would suggest picking up a spare one to have during gigs but only i you havent got a Thomann one already.
Cons
1. The only negative thing I can say about this strap is the comfort. Its very hard to wear the strap bare-chested as the side of the strap cuts into your chest. This is a consequence of the durable material, and is an acceptable trade-off, it is possible to cover the strap with an aftermarket cushion to protect it from chafing yourself.
All in all, I would buy this product again over any other strap.