If you go on the theory that "most people are stupid" then you can eliminate many of the Quiet One complaints. (Anyone that deals with the public can relate.) When people expect it to live up to it's name, you are going to have a lot of complaints from "stupid people". It isn't a far stretch to expect the pump to be quiet because of the name, but there are going to be some people that are going to expect it to be 100% dead silent. And then they are going to be ticked when it isn't and they are going to shout their dissattisfaction from the mountain tops.
The reality of it is Quiet One pumps are only about 30% less noisy than Mag Drives. To an insomniac with super hearing, that probably isn't enough.
I have five Mag Drives but only two Quiet One pumps. The two are both seven years old. Neither has had a failure to start but I have had one of my Mag Drives have that issue. The problem was a cracked impeller shaft. One shaft later, the problem was gone. Considering most people have never seen the inside of their pumps or take them apart for cleaning, I think more people will complain about a restart problem than fix it. For what it's worth, this is the first time I even mentioned my restart problem. I wasn't happy about it, but I didn't complain. I grabbed a screw driver to investigate. Many people would have chucked it in the trash before turning the first screw.
I also think that since Quiet One pumps are cheaper and sold in the box stores, there will be more of them out there. With more owners, there are going to be more people to complain.
From holding two comparable pumps in my hands, I'd never recommend a Quiet One over a Mag Drive, but for the cost difference and power consumption, Quiet One's do have an advantage. For longevity, I have not lost either brand of pump but I would predict Mag Drives to be far more bullet proof.