well ive check a couple of ebay style racing seats review general consensus they wear out very quickly the foam comfort and any other part quick look around an found these quotes on other forums
"Ive had two sets of 'ebay' seats, and they BOTH broke on me, the adjustment for the back stripped and the seat would lean foward or back on its own, making it impossible to drive. They are not very sturdy and will probably not hold up very well in an accident." - honda forum
"Now, less than 1 year later, the fabric around the 4pt harness holes is starting to stretch away revealing the white backing... and really pissing me off. Also, the left side of the seat that I kinda sit on to get in is wearing down really bad." mustang forum
i did see some good good reviews about there cheap and work but big issue is they don't bolt right with brackets and such i mean i just would get something approved myself
i do agree about the seat belt thing but look at crash test of seats
http://honda-tech.com/showthread.php?t=2515624 see there are differences in seats im just saying i hope i never get into an accident but if i ever do i want my chances of survival to be as high as possible.