We installed one to replace an open fire many years ago, without being aware of the pollution risks. Making the same decision now, perhaps we would have saved the money and bricked up the fireplace.
We use it infrequently to burn kiln dried wood only. Because we are off grid, it has come in really handy for when our oil boiler breaks down, or when we cannot afford to buy oil / we are low and oil prices are very high. It looks nice even when it's never actually used and for us it's a heating "back up" and something for special occasions.
Whilst I don't doubt there is harmful pollution from all wood burners (and this is a big part of why we don't use it very often), a lot of the evidence available doesn't take context much into account. It's hard to find specific information about how harmful burning kiln dried wood in an "eco" burner is, in a rural area. Many of the studies quoted in Guardian etc conflate this with burning wet/unseasoned wood in more old fashioned burners in urban areas.