I have one, we put in because we have storage heaters, which have no heat left in the evening, it's a mid terrace cottage about 150 years old, so no cavity walls to insulate, very draughty windows and external doors.
I find scavenge as much wood as possible all year round to get as much 'free' heating as possible, had chimney lined this year which was about £500 sweep £35.
Love it would'nt want to change it for gas central heating.