We are looking to replace our zero clearance Majestic Firebox with either a BIS Traditional / BIS Panarama / or another similar firebox insert. We perfer a unit with a optional screen (not the panaroma) Your thoughts & comments on how these units perform on a day to day basis is appreciated! Any short comings we should be aware of? Maintanence? Anyone have experience with these units? Other options are welcome! Thank!