In our old cottage we had a Parker Multifuel inset stove with back boiler and the control you had over it was superb, the air control was thermostatically controlled so getting an overnight burn was easy.
Our new house had a Franco Belge Limousin already installed:

It looks the business but its not a patch on our old stove with really basic air controls that, even when shut completely down, allow the fire to burn quite fiercely.
I have tried to improve the air controls which has made things better but its still not brilliant.
Thankfully its only our secondary source of heat as we have a Stanley wood fired range that provides CH and HW which is really good at its job. Plus our house is only 20 years old and we built it to a really high standard of insulation so it doesn't take a lot of heating but if we had to rely on the Franco Belge as our main heat source I would change it out.