Really worth getting a moisture meter - >£20. We've tried 2 log suppliers this winter and both say they are suppplying seasoned ready to burn logs but both contained logs well over the rcommended 20% moisture level - some as high as 40% (pretty much green). Agree that you sometimes have to choose between easthetics and efficiency. Our Clearview will burn very slowly on one log without too much glass deposit, but our Prity boiler stove is much more basic in the air control department and needs to be full and blazing (remembering that if your glass is sooting up a lot, you may not be burning hot enough to prevent tarring of your chimney). When we had our burneres changed after moving in, the chimneys were so coated in creosote that the diameter was down to 2" in places - surprised the previous occupants lived to sell us their house! Seasoned sycamore burns brilliantly.