I'll try to keep this brief, but as a starting point for those that skip read....
IF YOU'RE CONSIDERING A POWERVALVE, GET ONE! 
I ordered a couple of weeks ago, Nige was friendly on the phone, certainly not pushy and recommended the cat back system I ordered. Origionally I mentioned the WRC system but after learning it would be too loud for me, decided against it.
Fast forward to yesterday, missed the postman so had to go and pick it up from local parcel force office, 15 miles in opposite direction to where I'd arranged for it to be fitted, which was the garage my son works at.
Anyway, at post office in good time (07:50) after de-icing car and driving through freezing fog. Left PO at 08:20 due to it taking woman over 15 mins to return with box
Thick fog for the rest of the journey meant it took 90 mins to get there....
Started with this, not pretty, but never cleaned it as always intended to replace at some time anyway.
Opened box and saw exhaust for the first time, both of us amazed at diameter of pipework and finish of workmanship
Quickly removed old section of old system and started to fit new, which as it happens only took 1 hour from start to finish, again, testiment to the quality of the workmanship. (which can't be said for the quality of the photos, not me, honest!)
Everything bolted up tight and started the car, Flip me, the sound was amazing, a really deep, subtle rumble and driving it was even better, DSG farts seem louder and over-run burble and little pops. Exactly what I wanted.
Unfortunately the drive home wasn't what I expected, quite loud when accellerating and a bit droney... oh dear, starting to question what I'd done.
Got within about 5 miles of home and the realised the back seats were still folded down as the box was in the back, once home removed box, flipped seats up, put parcel shelf in and straight back out.....
PERFECT,
not loud, no drone and certainly not any louder than standard (in the car!) even got my wife's seal of approval, which is very hard to do.
The only issue I have is the tail pipes seem to be a bit low, doesn't look bad unless you look straight from behind. Although the original was quite low, so maybe just me being fussy.
Again, not a good picture but will get better in the morning.
Overall, chuffed to fk with it, sounds amazing, fantasic value, amazing quality and good service.
Apologies for the lengthy read, but credit where it's due to
@Powervalve Nige Any comments welcome, especially on the finished height of the tailpipes and if there's a way of raising them slightly, we had looked at bending the rear hanger, but couldn't decide at the time if it was too low or not
