I did a SS Flex liner early this spring also. Wouldn't call it a snap though. Mine was a tight fit. We had a heck of a time gettin it in. We put a 30' x 8" ss flex liner in an old plain brick chimney. I think if we had used 6" or 7" would have been a breeze. But the wood furnace had a 8" flue, so thought better stick with that. Had several guys on the roof, steep one too, and one down in basement pulling. Havn't quite finished the connection at the furnace yet, kinda put it on hold for a while. But the rest is finished. Looking forward to using it next winter. Should be easy to clean also. Was a slight offset in the middle of the chimney, if it wasn't for that, and the tight clearance, straight solid wall SS liner would have been my choice. But that really gets pricey! I think this should work well though.
Gregg,