I'll add my two pence worth to this, someone recomended it to me on here and I've not looked back... pics in my dub project thread in my sig.
As for the life of the shine, I've had about four months out of it in winter before it needed doing again, although I applied two coats in the first instance.
Incidentially, I've used Autoglym leather cream on the mrs' handbags, that works a treat... and I've used super resin on my front door...