Once I tried to play using PSP (through USB cable and FuSa Gamepad homebrew - yes, it works like a normal usb controller).
The d-pad was working quite well (I got used to it - IMO it's a little softer, and better, than DS3), but shoulder buttons as Airbrakes - horrible
I don't know how I was able to play Pulse using these

But generally, it can be a great alternative for the people who played Pure/Pulse a lot and can't get used to different controller (DualShock)