I read all the raving reviews on this site on the Liftmaster 3800 jack shaft opener, therefore, I went with it. It worked great for about 3 months. Then it lost it's settings. I reset all the settings and it worked for about a week. This went on for about a month. I then called in for tech support. They told me my garage door was not balanced. I then paid a local garage door company to come take a look. They stated that the garage door was balanced and that the settings were off. DUH. They reset the settings and it worked for about a week. I called back to tech support who said I needed a new module. They sent me the the wrong part the first time. Once I got the correct part, I put it in and reset all the settings. It worked for a week or so. I called back to tech support and they walked me through the settings on the phone with them this time. It worked for about a week. Called back to tech support whom then sent me another module and a secondary module up top near the gear. Same thing. It worked for a week or so. Called tech support and they sent me a new 3800. This one works fine with the exception of when the power goes off. If we loose power, the settings are lost. This only happens about twice a year which is a huge improvement, however, it still *****.
For what it's worth, when it is working, it works great. Nice and quiet. Would I buy another? Not if my life depended on it.