RBoy
(www.rboyapps.com - Making SmartThings Easy!)
2
You have a couple of options:.
MyQ is an option as you said and that works best with the Digital MyQ devices and requires a MyQ Gateway device or a built in gateway in your garage door controller.
You can check the compatibility of your garage door controller with these devices from this post:
These are fairly reliable devices, the battery lasts between 5-10 years but the require a stable power connection, a UPS is recommended is you have power fluctuations at your place.
You can also build you own garage door controller fairly easily with a contact sensor and a relay and add on more stuff like beepers, motion sensors etc to make is more feature rich/compliant with local regulations with this Virtual Garage Door solution (see the second post for a list of device you can use to put it together):