Hi there, yes I purchased the waves CR8, and have to say it is excellent on all fronts!
It’s only 10$, well worth it, very much like the sampler in Logic, with lots of cool functions etc.
One thing though, in Reaper, at the moment you can not drag media from the timeline directly into the sampler.
This was one of the reasons I purchased it, Waves tell me they are working on this.
So for 10 bucks definitely buy it!