I just tested the denoiser with the BMW sample scene and can highly recommend it
if one likes to save render times with path tracers. The BMW with it standard settings
rendered in 3 min 12 sec, while with a sample settings of 256 it rendered in 43 sec
and then the noise was removed with the denoiser. Pretty awesome, because I did
not noticed any loss in details, like you may have with other denoising solutions.

Regards
Stefan