We just bought a 2013 850SB, last week. So far slept in it 3 nights, impressed with the quality of bulld however it is really heavy, it has a total of 48" of overhang with the comfort step, I found on my model the c/g is about 12" behind the rear wheels on my 2006 ram 3500 srw s/b. driving it in high winds is a rodeo.
Otherwise is a really nice camper. I came from a lance 825 and my truck has stable loads and timbrens as well as bilstein 5160 shocks. Night and day diff between the lance 825 and the EC 850 I figure the ec is 1500 lbs loaded heavier than the lance and it was 2400 lbs ready for camping.