I have one and I love it. I use it in early autumn before the central heating goes off, in spring when the heating has been turned off, on the odd cold day.
I winter, it's used if I'm home during the day, as my heating is timed for morning and evening.
It sounds expensive - could you ask another place for a quote?
Finally, if you have room, you will find you can receive gifts of wood from friends who have done tree work, etc, which are fine for burning after storage ( probably two years)
You will become a Hawkeye on finding things for kindling ( pine cones, old reeds from reed diffusers,) and find your self hoarding newspaper for fire lighting and ash clearing.