Yeah get one there cool! Got mine from mods4cars and I would recommend them as a seller. Mine did go wrong but that was due to some moisture getting in the unit from my roof seal problem. I posted it back to California for a few quid and got the unit back a week later with new updated software, free of charge.
I agree that VW should have done this as standard but there we go.
It most certainly is the coolest mod, and you can set it up the way you like it. I plip the car as I leave the front door of the house, and the roof has just finished stowing away as I reach the car, NICE. Plus you can just do windows and/or sunroof also.
But the best thing for me simply that you can get the horn to chirp on locking the car so you know for sure you've done it as you walk away from the car, without looking back round to check the hazards flash.