Oddly enough, I came on here to ask a similar question.
I've been looking at the PCP deal as way to buy a new Golf.
In a nutshell.you order the car in your spec, pay a deposit then agree on a final value, an agreed mileage,then pay a monthly amount.At the end of the period, you pay it off and you own the car,chop it for a new model or finish the contract and walk away.
VW are also offering a £725 pound deposit contribution and 2 years free servicing as well, on a MK7 GTI .
Downside is that you never actually "own" the car,with it being a contract between you and VW finance and you run the danger of being in a cycle of forever paying VW for cars you wont actually own if you continually change every few years.
If you don't mind this, then it seems to be a decent deal,although I can't help but feel that there's a catch somewhere.