The only one I believe is Dr Shen's / Health Massage in Regent Street Shanklin. I can't find a current website or ad for it but the google listing is correct so it's simple enough to find the address and phone number.
Price is typically £30/30 minutes, £50/hour for massage and then extras to be agreed with the girl, usually they'll offer HJ/BJ/B2B but no FS.
Girls change frequently so it's generally luck as to whether a given service is good or not, and I don't think there are any regular girls though I've never visited often enough to be sure about that.
The biggest complaint about this place is its incredibly indiscreet. The entrance leads directly onto the busiest shopping street in Shanklin so you are very visible as you enter and exit.