Swissvax - worth it?

[Sparkyhd]

Deliberating the same issue myself and my inclination is not to pay for it, especially since the dealer is quoting an annual reapplication of £499 per annum.

Any recommendations for gtechniq detailers near Watford?

Also it's a Boxster so what about protecting the roof or is the factory sealant good enough for 12 months?