Ol' Doodle and Mrs. D. love our Liftmaster belt-drive with MyQ.
One thing...Doodle can't count the number of times he's been up the road a bit and then suddenly wondered if he closed the garage door after leaving. Also, on more than a few occasions, Ol' Doodle has gotten a text from a neighbor who said the door was open...and almost ALWAYS Doodle specifically remembers pushing the button and watching it start to go down. So perhaps an errant leaf or some other obstruction got in the way of the sensors and made the door go back up while Doodle was happily and cluelessly motoring away from the house assuming that all was well.
Now, with the MyQ app, Doodle can not only open and close the door remotely from anywhere there is a cell phone signal...but the app shows you how long your door has been open or closed...so you can verify that no one else has opened it, say, while everyone was away from the house. The app also has a few settings you can adjust to alert you when the door is activated...so you'll know if the door is opening and whether or not it should be.
EDITED TO ADD: If you have teenagers, knowing when the door has opened and closed at any given time, could be extremely useful.
Is it a NEED to have? No, probably not. But Doodle would certainly characterize it as being a little bit more than merely a NICE to have.