Both my neighbor and I bought replacement Champion garage door openers. These are designed for DIY installation, and appear to be very good quality. His is well over a year old, mine around 6 months. The only challenge was using the original mountings for the motor to the ceiling. In both cases we were able to use the original mounting on the ceiling, and the original connection to the door, the mounting to the header above the door must be changed.
We both like the fact that we have units that are different from the neighbors and the possibility of the remote controls interfering has been eliminated. Also, these units are quieter then the original MVP units.
Since we did the installations ourselves, we do not have any experience with installations by either company.
Hope this helps. Send me a PM if you would like to talk to me.
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Pennsylvania, for 60+ years, most recently, Allentown, now TV. 
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