The Chamberlain B970 is what I would consider to be the top of the line D-I-Y garage door opener on the market. It has a strong, quiet motor and every feature available on a residential garage door opener.
At 1.25 h.p. equivalent, this opener has plenty of horsepower for any door. It is quiet, smooth, wifi/smartphone compatible, and has a battery backup. The fancy wall control has motion sensing light activation and can be set to automatically close your door after a few minutes in case you leave it open accidentally. Two remote controls, a keypad, and safety eyes are included. Of course, the remotes utilize the latest security technology, and are compatible with your vehicle HomeLink.
The B970 is as quiet as anything on the market. Replacement remotes, safety eyes, and other accessories for Chamberlain products are easy to find, and any legitimate garage door company will carry common repair parts (not necessarily the case for all brands) . I work on more Chamberlain products than anything else, mainly because there are so many of them out there. If you are interested, here is a deeper dive into Chamberlain products.
The battery backup will need to be replaced after a while, usually 5+ years in the future. This is true of all the other brands, too, and it doesn’t matter if you use it or not. Luckily, it is very simple to do yourself, and if you can install the opener you can certainly replace the battery.
The wifi/smartphone connection works well. Chamberlain has offered the MyQ wifi connection for about five years longer than any competitors, and so has a better developed and proven smartphone app that lets you operate and monitor your door from anywhere you have an internet connection.
If you have a really heavy or “clunky” door, you may be better off with a chain drive opener to prevent the belt from slapping. The Chamberlain C870 is the chain drive version of the B970, and is a little bit less expensive, too.
Even though the 1.25 h.p. strength of the B970 is enough to lift any door, this opener may not be the best choice for extremely heavy doors that have a hard take off from the ground. The weight of a huge door can cause the rail to flex, leading to a bouncing action during travel. This is usually corrected by attaching an additional support half way between the motor and the wall mount. Unfortunately, the Chamberlain square tube rail does not allow for this. Luckily, this is only a concern for the absolute biggest doors (for example a 16×8 wood carriage door with windows). In this situation, you probably need to get either a LiftMaster or Linear opener, which will only be available through a professional.