Don't like it but also got some concerns.

Can you ride it on a bike license or does it require a car license, like the MP3 LT?
35hp... so it's not learner legal (if drivable on a bike license ).
258kg weight, thats 40kg heavier than other 400s, bar the MP3.
Has to many gizmos/ to complicated design overall... more to go wrong and it's going
to make services & parts expensive.

The only it would interest me is if it was fully enclosed like Irev said and with a bigger engine
to haul it's bulk around.

rintintin wrote: I found the maintenance costs daunting

Same here. I remember paying £200 for the one year service and it wouldn't have been long until both front tyres needed replacing which I guess would've been £80 plus fitting.

With both suspension arms linked to a single shock I can pretty much guarantee the Pug is going to be a pig on front tyre wear issues.

In theory, the extra front tyre and increased contact area should reduce wear by half. Factor in the off-centre contact patch however, and you normally see that benefit reduced, so that you might see a decrease in tyre consumption of around 25-30% in the real world.

You won't with the Pug, any more than you do with the MP3 (and if you compare the wider MP3 `car` licence version with the wider wheel spacing against the original I'm sure you see a difference).

However, I bet the Quadro is far easier on the treads.