We own a used 2007 Mid Bath. I flew from VA to CA to buy it from the second owner then drove it east. I have been camping in cold weather. I close off the cab area with a quilt hanging from the over cab bed (I do the same in summer). The heater has no problem keeping the living area warm in winter. A couple months ago I was in CO and the temperature went down to single digits. It did get cool inside but not cold. We were using the factory electric heater in the AC unit over night. Then in the AM I turned on the propane heater. The interior then warmed up nicely. I was still winterized for the trip until I got to warmer weather. I have noticed no drafts from the windows. The windows fit very snug.
The RV drives well. It tracks well through the corners. I will change out to Koni shocks when the current set goes bad, but that is a Ford issue and not a Lazy Daze issue.
I like the Mid Bath. The layout works well for the wife and I, especially when our grown daughter tags along on a trip. If it were just the two of us I might consider a rear bath but over all I am sold on the 26.5'(27' after 2008) floor plans. The simplicity and large OCCC make touring easy. Also for me, the big windows make the RV feel more spacious than a larger room with small or no windows.
John