A lot of people have good things to say aboutand just to name a few. I'm currently taking for my non stim pwo and I like it a lot. Just like nearly everyone else will tell you...you get great pumps off it and I even feel some focus effect I feel. I donno if its a coincidence or not but I feel like I've been more focused since I've started taking it.
I'm sure u could just use the search bar on here and fight plenty on non stim pwo's also.