I've been full timing in a 2013 3800 since March. I can't tell you how many miles I've pulled it but it's been from Sonora, Mexico to Arizona, Indiana, Colorado, Oklahoma and now in Kentucky.
All in all no major problems. Just the little 'joe home owner' things you have to do. I am waiting on the high temperature limit switch from the dealer but it hasn't been a major problem without it.
I feel the slides work well as long as you are level and you lubricate the rollers occasionally. Be prepared to do the things the manufacture and/or dealer didn't do. Don't assume or take it for granted they will send you away trouble free. I left the dealership after taking delivery on mine and didn't know I had a low tire until I checked them 1100 miles later. I assumed the dealer checked them but.....
There will be things you'll want to do to make it more liveable. You'll want to change the TV coax connectors to the compression style. You'll want to have a PEX tool and rings on hand. You may want to get rid of some of the harsh halogen lights and replace them with softer LEDs. Lots of other things you'll want to do and things you'll need. This is the place to learn about the Voltage toy hauler so dig in and soak it all in.
Learn the slide mechanism and how it operates because there will be the time when the slides will hang going either way. LCI.com is full of information about the Schwintek slides as well as Schwintek themselves.
The downside of the 3800, it's long and takes a little time to get the feel of backing into a tight space, or pulling out for that matter. Nothing at all like backing a dual axle trailer as far as I'm concerned.
2013 Voltage 3800, 2012 Chevy 3500 HD
2010 Yamaha V Star 950
2009 Yamaha Raider
Volunteering with Habitat for Humanity Caravanners