I thinkit depends who you get pud, some of the techs there are really good. Its if you get a dodgy trainee learning to weld. But that system you've shows is a bit rediculous anyway and its clearly someone who has gone a bit chav on his motor.
I'd stick to a single exit and go for performance only not for looks. I dont see the point otherwise. As you might as well have cheaped out and gone for an OEM replacement.
The one you have shown is pretty bad. I wouldnt be happy folding over money like that. However the oens i've actually seen have been pretty good.