I can believe that Urban Grey is a bit of a marmite colour, but we are in the 'love it' camp, and it's a big reason we chose the Sport. Friends have also said, unprompted, that they like the colour. We also appreciated the different, but still understated, interior trim of the Sport. We find the ride is very acceptable - it's firm but pretty resilient and not at all crashy - and the steering is nicely precise.
The downside of the Urban Grey, which may have led to the primer comment, is that it looks great when glisteningly clean, but can look a bit flat when the dust starts to settle on it. This very dry summer has meant that this happens after about three days, but, praise be, it looks great again when washed down by a rainstorm! Not being a fanatical polisher, I just use Autoglym Body wash and Rapid Aqua Wax to keep it clean and a bit shiny