I agree with the comments above having bought my MK5 Golf GTI from them a few weeks ago.
Respectful salesmen that aren't overpushy and happy for you to spend a lot of time looking over the car hassle free.
Are able to put together pretty decent finance packages that can often make a previously unaffordable car within reach.
If there's money in the car there happy to do a deal, I managed to get a generous part ex and some new tyres thrown in on my deal along with an APR rate less than many high street banks.
The only negative I found was a reluctance to give test drives, as you can imagine with a large range of performance kit they get a high number of timewasters and are trying to protect the cars from being in the hands of too many chavs, mileages being increased, having to re-valet constantly. At the time your considering purchasing you may find this a bit frustrating, but when you buy the car you'll be relieved they were selective about who got to use your car.