As has been pointed out, PCP's are the devil - even HP is a better idea, and easier to get out of to boot.
I agree
I paid zero deposit and got Seat finance over 5 years at very low APR, with 16350 New Leon FR TDI (with a few extras - see below) costing me £333 month (with no baloon payment at end and inclusive of GAP insurance).
A personal loan worked out around 8 pounds a month cheaper and I agree that loans allow you to sell car later on without any finance headaches
However, HP provides other benefits, allowing you to hand the car back if you wish beyond mid term, with no penalties or payments (check small print on any HP finance agreement - your right to terminate - halves and thirds).
I have done this several (2+) times and guarantee that taking this action does not impact on your credit rating - which relates to your ability to maintain payments.
With my current new car, I even got new finance throught the same company that was taking back my old car with several £K negative equity - but they still let me have a new deal....!
Would always consider HP because of these extra benefits
Mike
57 FRTDi, 18", BT, Armrest, Alu Trim, Muddies and Mats