Smarty wrote:

I have owned both chain drive and screw drive openers, most recently a Genie
screw-drive unit I installed about 18 years ago. As I am now looking for a
replacement, I would much appreciate any thoughts about what is a really
durable and low maintenance replacement.

I see screw, belt, and chain drives being sold, and there may be other
methods used now as well. Is any one approach vastly superior, and is any
specific brand really exceptional?



Since I install then professionally sometimes, I prefer the
Chamberlain all chain drive with one piece rail.