Chamberlain, Sears & LiftMaster are made by the same manufacturer
Overhead Door makes Genie

Stanley is out of business

In January of '02, THAT well known consumer product rating magazine said all brands & types perform about the same.

One-quarter horsepower is fine for single doors.

They rated the LiftMaster Estate Series 2500 easiest to install and adjust

Gene Pro Stealth GPS1200IC/Pro706BC and Sears 53965 easy to install

They rated most other Genie models noisy or hard to install.

If quiet is high on your list choose a belt drive.  If speed is important get the Genie Excelerator ISD990-2

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