This is the first time I have ever heard of Bobro's having any issues. I beat the crap out of one for a while and it didn't budge or have any issues and I can assure you I hard use my guns way more than most people.
Defoor uses Bobro's on his rifles, he has never reported an issue, again pretty sure he puts more time on his guns than anyone here.
As far as MrGunsnGear goes, his credibility as a "reviewer" of gun anything is extremely suspect. Without derailing this thread, I will just say that I have asked him on numerous forums how many rounds he has put through guns/items he was reviewing, how long he has used them and in what conditions, I am still waiting for a response on any of those questions. He makes money reviewing items on youtube, he does
unboxing videos of
gun parts, think about that for a moment. Anyway, nothing he has to offer should be looked up on as credible but at the same level as hickock45 and nutnfancy.
Those people you cite who had issues with Bobro's did they get new ones from Bobro for free? I'd bet they did and I bet they work perfectly fine afterwards. I'd also bet these guys did not follow proper installation instructions as they are not standard to other optic mounts. They are do not need nearly as much force and do not require to be "bolted down," it says so in the instructions (if they read them).
I'll stick to my experience and people I know who hard use their guns with these mounts on them, not a single issue there reported.
*admins/mods if linking is not allowed to other forums, delete please....
This is from last year, one I remember off the top of my head, I'd have to go looking for the others:
http://www.m4carbine.net/showthread....10#post2412310