Must admit I wouldn't have one, despite the fact some people say 'they have passed all da rools and regulayshuns'... I know personally of 3 people right now who have log burner regret. One is a young mum (aged 31) who had a baby in November. She paid some £3,000 back in the springtime of last year for the supply and fit of one, and she says she hates it.
She lives in a small 2-bed house, with a small lounge (12 X 12 feet,) and she has this colossal logburner in it. It's too hot 90% of the time, and she ends up opening the windows to let the cold air in as it's stifling hot. Defeats the object of lighting it to warm the house really!!!
Also, she (and the others) say they are shocked at how quickly the logs burn through, and are forever having to get more and more, and keep having to chop them up, as they are often too big to go in the fire. AND they are shocked at how often it needs cleaning out, (the chimney/flue...) It's much more high maintenance than people let on.
In addition, they are all concerned about noxious fumes too. MAYBE there is nothing to worry about, but I wouldn't risk it personally. Neither does the woman with the 3 month old baby. The baby is always in the kitchen or hall when the logburner is lit.
Problem is, once you've had half your chimney breast hacked out to accommodate the logburner, it's hard to go back.