I wouldn't call this a platinum experience.
Used a groupon voucher which made the wash a decent price. But it's just at the back of a servo, and there is nowhere to wait - unless you want to sit in the smoking area with the 'boss' (just tables and chairs in the open).
The interior clean was ok - had to polish off some of the spray they had used myself as it marked my interior and they hadn't wiped it.
The external clean would have been better through an auto car wash.
Glad I didn't pay full price. Probably won't bother next time.

Approximate cost: $27