OP,
I've got a 2012 Voltage 3600 Epic that I picked up in March. I've been full timing in it since April, and have had very few problems. I'm taking it in this weekend for some minor work, but only because I was going to be out of town anyway. I have had ZERO leak issues from rain (but I do live in Southern CA, so it's not like there's a lot anyway), and I also have the slide toppers.
To date the only warranty work I've had done was that the wires powering the main slide came undone, and i had to have a mobile tech come out and put it back together. The dealer(Richardsons RV Menifee, CA)/Dutchmen came through with flying colors on that one.
Will let you know if I have any issues when I get back from my trip, but so far I have nothing to complain about. Most of the issues were things that you wouldn't find without living in the RV.
I wouldn't hesitate to recommend a Voltage to anyone, and it would be first in line if I ever replace this one.
Dutchmen also did some custom work on mine to make it amputee friendly. It's not handicap accessible, but I've got multiple grab rails installed throughout the rig to help me at stairs and particularly in the shower. So, I will admit to being biased by a company that made a product do what I wanted/needed.
