Yup is supaguard but with haggling it will be about £150 for the while exterior and interior valet, polish, clean...
That said if its possible to achieve the same results in a day doing it myself then might be a better option
Highly dependant on who is doing the polishing for you. The Zed has very soft and paint so I wouldnt want anyone other than a trusted pro detailer to go anywhere near it.
I've never bought into this supaguard stuff, if it was that good, pro detailers would rave about it. Much better off giving the car a bit more TLC and cleaning/waxing it yourself and maybe get a pro detailer to give it the once over now and again.