Likewise, the Missus was given Autoglym Lifeshine as a no-charge add-in on her TT roadster. Although I scoffed when she told me and rolled out the 'total waste of money' argument, I wash the car regularly (no, of course not as regularly as mine!) and have to say, the treatment's standing up pretty well so far (4.5 months). Car still has a lovely gloss (it's silver so naturally easier to keep looking good) but water still beads as though it's just been waxed, road detritus washes off easily with the mitt and even without waxing, the paintwork is baby-bum smooth afterwards.
Have to say I'm surprised - but as has been mentioned, the success and longevity of these finishes is often a function of the care and expertise involved in application, so she must have been lucky.
I have no doubt I'll have to start the waxing routine in the next 3 months or so but so far, pretty good.......