I have the regular one of these. I found the train ride sound to be particularly relaxing and soothing.
The brook and water sounds were too active for my taste.
Unlike the excellent white noise machine this company makes, I find the sounds on the regular version of this machine are more a matter of taste, and can be a love/hate kind of thing.
I also find that the white noise machine is more suited to bedtime sleep, whereas the sounds from the regular version of this are more suited to relaxing and napping.
YMMV, of course, and also I am not familiar with th sounds on this SE version. Just the regular one.