I made the decision to go with the wood stove insert rather than the free standing simply because I already had an inefficient fireplace. I justified the $2600.00(US) installed cost by convincing myself that the fuel would be free for the taking - I live in a town in a national forest where tree thinning of properties is mandatory. I can find firewood alongside the road year around, waiting for the solid waste grapple truck to pick it up for hauling to the composting plant! When I see a pile that is manageable without further sawing up, I stop and load up the back of my vehicle.
The other factor is the size of my house and the fact that it is well insulated. I also live alone, so closing off bedrooms and other unused parts of the house does not cause a conflict. I use the wood stove first thing in the morning for about 3 hours (5am to 8am) and then let it die out. Normally that's all it needs to supplement my gas furnace the rest of the day. On extra cold days I will re-stoke the wood stove in the early evening, when there are still hot coals remaining to ignite my kindling.
IMPORTANT to my house comfort level is the circulating ceiling fan in the main living area where the wood stove is located. My house is a single story of about 1600 sq ft with a crawl space underneath but no basement (amounts to the same thing). The stove was advertised as being good for 1200, but as I said, I close off parts of my house since I have to have a cold bedroom to sleep in.