They are spendy but by far the nicest cab that I have seen. Fit and finish is perfect I think. The inside is all lined with a carpet kind of material. I don't know the price for a Maverick but for the Commander they are around $5000, if you have the money I would say that is the way to go.
No way the heat from the engine or exhaust is going to keep you warm in the winter with no winter jacket. Either you wear snowmobile gear or buy the heater. This company that makes the enclosure has a heater kit you can buy. Check it out on their website.