We have an 07 Winne View H, with slide, jackknife sofa and dinette. Bought it new in 06, been living and working (software) in it for the last 10 years, and much of that time has been in Mexico.
Still love it. Has held up very well, large enough for us to live in but relatively nimble in Mexico.
Everyone's different, but I highly recommend the slide, especially if you travel with more than one person. Makes all the difference for us, so much more space means you can have a couple of visitors inside comfortably f the need should arise, and has never failed (and we're much less than anal about maintenance).
I second the suggestion to get the metal/aluminum turbo resonator. Solves that issue forever.
Carry some spare belts, and order an after market ATF dip stick (it doesn't come with one). Last year we ran low on ATF fluid due to a leak while on the way south, put us into limp mode, which isn't fun on narrow 2 lanes in Mexico .
We needed some service work on it and discovered while in Sayulita that a new Mercedes dealership opened in Puerto Vallara and works on Sprinters. Nice people, great prices ($25/hr). And if you ever need it, the Mercedes dealership in Hermosillo will also work on Sprinters and are equally friendly and low priced.
