We stayed in a Heritage Sleeping Cabin (a split cabin). It had two Queen beds, small table and two chairs. The bathroom looked brand new. Everything neat as a pin.
Small porch with two chairs, perfect for sitting out in the evening. Loved everything about it.
I don't want to repeat everyone else's comments but will add a few things.
The split cabins are separated by a cinder block wall, so no noise. Everyone talks about Maligne Lake, but don't pass by the Canyon on the way there. Worth the visit and short walk.
The town of Jasper is very cute and much nicer then Banff.
The front desk can direct you to a laundramat in town. It's on Patricia Street and it's a combo, laundry, internet/coffee bar. Two Canadian dollars buys you 20 minutes on the internet. Washers cost $4 CAD.
Others have talked about getting reservations early (we got ours in Jan for a Sept stay) while we were there, we heard two different calls come in for this Thanksgiving (sold out) and then the callers asked about next year! Reserve early, you won't regret it.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.