I bought a Edge as my first RV and have been very satisfied with it. I was looking for something that I could tow that had a max loaded weight of 5,000 pounds or less.
The Edge was Heartland's entry into the high quality Ultra Light Weight category. They exited that category about 2 years ago. The Edge whole line can be towed by any SUV or Truck with Class IV hitch and 5,000 pounds towing capacity. I have a M21 (length of 22' and height of 10') which weighs 3600 empty and max loaded weight of 4500. This seems to be about 700 lbs less then the similar floor plan North Trail ( but note the North Trail is 6" wider so may seem a bit bigger inside ).
Edge is all aluminum stud floor, side wall, ceiling construction but would guess that North Trail is that way too.
Like the North Trail all models had full baths with sink, shower, toilet
Some of the deltas vs. Heartlands current light weight category RVs:
Edge: width of 7' 6" - current ones width of 8' 0"
Edge: had a special frame with openings in the center I beam part of the frame rails to save weight
Edge: has no provision for a rear ladder to save weight
Edge: has no real rear bumper, just a decorative rear bumper that folds down to store sewer hose, etc.
Edge: 3 season, nothing surrounding the water, grey, and black tanks to protect them from freezing
Edge: no drawers, has plastic tubs on slide tracks instead to save weight yet provide same functionality
Edge: light weight slide out - does not extend as far as non-light weight trailer slide outs
Edge: 36 gal fresh, 32 gal grey, 32 gal black tanks
Edge: basic 16K BTU furnace and basic 6 gal propane only hot water heater
Edge: 7' ceiling height in most of the unit, less over the bed and in the bath
Edge: One piece moulded counter tops with integrated sink
They used some "Euro" trailer style items to save weight as well:
- Euro style 2 layer thermo-pane windows with integrated blackout shades and bug screens
- Dometic made in Germany RM 8255 3 way refrigerator
- Dometic 2 burner cook top (no oven, Edge uses that space for storage instead)
I made a few upgrades you may want to consider if you buy an Edge:
- put an accumulator air tank behind the hot water heater, so the water does not pulse when using water from the RV via the pump
- put a fantastic fan in place of the passive vent above the bed
- replace the OEM Tow Max tires with known good new ones - I went with Maxxis
- decent shower head - I went with one of the Oxygenics ones