ive got my own valeting business and a coupkle of my customers have used chips away , with varying reports, one said he thought they had done a brilliant job and price not too bad , the other said they were cr*p, price was steep and wasnt happy with their attitude in general.
why not try bodymaster, thats the one i recommend to any of my customers. they are also mobile and will give you a quote on inspection, but can also give you a rough idea of cost without seeing.
iain