I took delivery on March 23rd of last year and so far have16,350 miles on my Mandello V100S. General comments, relating to many other posted comments:
SEAT - Comfortable for 3 or 4 hours and then starts to get bothersome. I've contacted Corbin but they don't have anything available yet, if someone has found a good looking LD replacement, I'm all ears.
WINDSHIELD - I immediately went to the Touring Windshield and for me it's a marked, and satisfactory step up from the stock windshield.
HEATED GRIPS - No problems whatsoever
EXHAUST SYSTEM - One area where I had a warranty issue. After 10,500 miles the exhaust pipe broke immediately aft of the CAT. My dealer fixed it under warranty, within a few weeks and until then I was able to wire and wrap it so that I could still ride. I happened to be in Mandello del Lario last September and stopped at Agostini, the Moto Guzzi dealer in Mandello and they showed me a new exhaust system that they had built for the Mandello, but they hadn't tested it yet so didn't have performance or noise data on it. But it sure looked nice. If it fails again, I'll look into an aftermarket pipe.
TIRES - The Pirelli's that it came with tracked rain grooves terribly, I had them replaced at 2500 miles and went to Michelin Road 6's which is what I run on a couple of other bikes, and it cured the groove tracking issue and I rode over 12000 miles on them before the rear tire started to get close to the point where I wouldn't be comfortable leaving on a decent length ride.
Other than that I haven't had any that has been notable or bothered me.
Roger