Its a decent unit, and you have the newer replacement for the previous DA-01. They made a few detail refinements to the one you have. Not ALL apps are compatible but its still a very versatile unit.
Fits like any other radio really. the DOUBLE DIN aperture in MK 4 golfs and above are generally ok for size and the original mounting frames are ok to fit into golfs aswel.
Of course the drawbacks are it dont have a removeable panel or front screen...nor is it a cd unit.
But once mounted properly, it looks nice and flush.
It can also work with android phones aswel although you do require a different adaptor lead for whatever handset being used which pioneer can supply or other sellers online.
I like it and think its rather clever, however, it is an acquired taste and not to everyones liking.
