My Custom has about 4000+ miles. I like it a lot. But a couple of caveats...
Rubber-mounted engine shakes a LOT at idle. Like a Harley Rubber-Glide. Some people like it, I guess.
Rear shocks are fancy-looking but have WAY too much compression damping and are a pita to change spring preload.
Seat no good for passenger, at all. And if you're tall, your left knee will make repeated contact with the left cylinder. I had to have mine rebuilt with a more rearward seating position. Seat now even worse for passenger.
Bars too far forward for me, even before the seat mod, installing Touring bars was a big deal with cable/hydraulic line re-routing.
Steering heavy at parking lot speeds, even with fork legs dropped now 20mm. I'll have to change the rear tire soon and I'm hoping a 180 might improve things, but I'll guessing not. I believe the triple clamp changes they made to the Eldo brought back the 'neutral' feel I've had with every other Guzzi I've owned. The Custom definitely does NOT have that, not at walking speed.
Having said all the above, the machine is a hoot. Feels great once it gets going, handles very well at any speed over 20mph. And a real weirdo, which is saying something coming from Guzzi.
Joe