Have had ours since 2012 they are a great camper no major issues and have used it a lot. Had the hot water heater replaced under warranty and other than that no major issues, just wish we had a ten gallon.
We use it a lot, winter and summer, boondocking and travelling. No issues with slide, fridge works fine its big for us and good for a week. We camp as low as minus thirty Celcius after which it is a little less comfortable. Always pack our Honda 2000 and run it all night when needed both for a little electric heater and to keep the batteries up (they will only last one night with just the furnace running we have two 6 volt, still good after five years).
The suggestion above from Towpro is a good one to wire the fan to the basement to run separately as well lets you run just the little electric heater when you can get by without the noisy furnace.
30 pounds of propane only lasts a couple of days when really cold. We winterize and stop filling water when it starts to stay ten below Celcius at night (October?) and go blue bucket.
Couple of suggestions for AF to consider is battery cut off switch outside in Batt compartment would be better than under the sink that way you can run slide in and out without being hooked up to shore power.
We do not like or use the house lights on the dimmer switch I have sensitive hearing and they produce a high pitched whine...still plan on replacing that. We also upgraded to all LED lights they are so much better for batteries.
Add an additional slide switch up by control panel to draw in slide at night when stealth camping or to keep warmer.
Also wish the bathroom sink would drain to the black tank Triple E does this and you can boondock for longer grey doesn't fill quite as fast and adds more water for dumping black.
We have on board Onan 2500 propane that we love for quick roadside stops but it is very noisy with lots of vibration. Not for use while camping except for short specific periods.
Would definitely recommend solar install if you have a choice, I use a free standing separate 100 watt solar charger when we leave it at the lake for a week to keep the fridge running.
Only change I would make would be to go with a one ton Dually right from the start. Love the diesel for the hills but that is really a personal choice the newer gas jobs have improved both mileage and power.
Cheers.