I've purchased this rug to use under my Roland TDKV-17. It's perfectly sufficient in terms of the size and could fit few extra couple drum stands too. It is not enormously huge, though, so fitting a 3-tom, 3-cymbal setup might be tight. It does the job for me, so here's my 5 stars.
The surface textile is soft and comfy to walk on barefoot. Being a rug, it may be offering minimum sound diffusion by coincidence, but you should not expect it to muffle any noises.