I have an OBX. Its not the best, but I definitely don't think its bad. I love it, sounds good, nice deep tone on my V6, quiets down at high speeds and in high RPM range. I mean, it depends on what you mean by cheap. If cheap is $200-300, then go for a better brand, performance-wise I don't know how much better but it should be to an extent. All I am saying is that OBX is a cheap muffler thats not cheaply made IMO.

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‘96 EX-AV6 Sedan Heather Mist(Champagne)
Euro clearcorners/bumper - cleared rear signal - woodgrain kit
Hyperwhite: lows, highs, corners, frontblinkers, reverse -
painted OEM sideskirts & front/rear valence – OBX exhaust w/DTM tips
Poorman’s CAI – 35% tint all around – amber illuminated interior
aluminum mesh grill – 10” blue neon tube