In regards to Paradice....
Buddy of mine who used to work on my channel had issues with them sending the wrong PCB for his LEDs to light up his fightstick. Ended up giving up on them after a long email thread back and forth.
I bought a Game elf converter board which was DOA when I received it. it was poorly made and was obviously bargain basement silicon. Shipping took forever when they were still in Hawaii (I live in Cali, it shouldn't take 3 fucking weeks). Got one from Jamma Nation X instead which was x10000000 better and actually worked. Got it in 2 days.
Yea, I don't deal with them anymore.
If you can, checkout FocusAttack.com, they have always come through for me.