This is a really nice stove and the first we have purchased in about 15 years. We had a cast iron Dovre 250 and the Saltfire is steel and thus much lighter. Installation is easy to an existing flue - just slots in and then you add fire cement or resin. No need for a collar. Stovefitter's Warehouse were very helpful with this purchase when I contacted them to ask about sweeping through - the online manuals from Saltfire said that you could not, but you can (which is a relief as we did not want to put a hatch in the flue). The fire performs very well, the ash almost burns to nothing. We have not needed to empty it of ash since we had it. Lights easily and gets nice and hot. A stove thermometer puts it in the correct operating range. The glass stays reasonably clean and you get a lovely view of the flames. My only negative is that the door handle is awkward to close - we turn it the wrong way frequently, but maybe that is because the Dovre was very easy. For the cost of this, you cannot go wrong and its Defra approved.