I love mine, actually looking forward to the cooler weather so we can get it back on. If you leave all the doors open you can comfortably heat downstairs but it only has a negligible effect upstairs.
Like other have said it probably won’t save you money if you have to buy fire wood but there’s nothing better than having it on in the winter. The only draw back with me is that it tends to send me to sleep once it’s on haha. As for cleaning, I just wait till it’s cold and the hoover everything out with a Henry Hoover and you don’t get any dust :)