We have a 2013 27-5L and in a word - Heavy! Ours loaded out ready to camp weighs 11500lbs. The 2013 is 28 feet long and I too do not like the electric dump valves that came on ours. We've Boondocked in ours over 200 days so far and no problems. We use a Big Buddy for heat and it keeps the trailer nice and warm in temps down to 15 degrees fahrenheit. The absolute biggest problem we and others have with the 2013 and 2014 models is the gray front cap fades really fast and bad, your only option is having it painted at your expense.
Bill