DIY mosfet power amp kits from china

I see several offers from ebay of diy or assembled lits of mosfet power amp pcb.
some looks interesting and i'm questioning about if some of you have tried them.
Here's one:
NEW LJM L15 300W Assembled Amplifier IRFP240 IRFP9240 MOSFET Audio Amplifier DIY | eBay


It's got complementary outputs IRFP240-IRFP9240 is a plus.
Claimed THD is low, but what about reliability and more important sound quality??
There's even some PASS copy of V5 pcb's.
I have a nice beefy power supply and case with big heatsinks.