After years of lurking and reading hundreds of reviews I purchased the 12x12 alaknak, along with a vestibule.
Go to Cabelas website and read the reviews, there are many.
The biggest complaint you will read will be about breathability, with the assumption that the canvas is simply better. Well I rarely ever read a post of anyone complaining that either didn't have too many people in it to expect anything else, or was using propane heat. Clearly if you use wood heat, it will help dramatically.
I do think you will find it will not hold heat as well as heavy canvas, but at 30-40% weight savings it will be worth it, especially if you do have a stove.
For a packable stove, I found a super deal on the smaller packer stove from cabelas so I bought it to try, though it seemed too small to work well. Well it was capable of running us out in 20deg snow storm in No Idaho last thanksgiving. The problem with the small packable stoves is they can't hold enough wood to keep a long slow burn. You will run into this problem with most stoves, but if you have enough stock to bring a big enough stove, no prob.
Do buy the roof and floor panel. Embers will burn holes, so have that extra layer.
Oh yeah, an the vestibule option works awesome. We set up a 6'x30" folding table with a stove and all the food stuff and stored all extra gear out of the rain and snow, plus it helped keep the cold out.
Sorry for the length, but I don't think you will regret the purchase.
PS the tent ways like 65lbs, but that is with all the poles, and you can likely do without ALL of them by cutting some side poles and tying the center up to a tree above.