Why not go for an RNS510 Version C from someone like N13KKF, less than £600 and you've got 7 digit postcode, the benefit of OEM looks, you know it will work with your Golf and adding value to the car when it comes to selling it.
Jim
Pioneer has full post code search plus bluetooth, much better imo 
But it's twice as much as the RNS and doesn't support reversing camera's I know not needed for everyone.
And it's twice as much, or did I say that already 
Jim
I paid £400 for mine, it does support reversing camera so much better 
Very odd, when I enquired when I bought my MK6 the dealer told me that it didnt! Oh well, never trust what the dealers says I suppose. But the original thread asks is the £995 worth it, IMHO no it's not when the RNS is OEM and half the price....
Jim
Jim