I have a Schuberth Concept with autocom speakers in it.
First the helmet: I love the helmet, it fits my head perfectly, and build quality is excellent. I have a good deal of confidence in its ability to protect me in an accident (though no experience, thankfully). When I first bought the helmet, and before I fitted the autocom speakers, it was incredibly quiet, but it is starting to get a bit more noisy now, with the speakers in, and after nearly two years of daily commute plus long holidays.
The Autocom speakers: Are a real bugger to fit in the Schuberth. I contacted Autocom for advice, and they were really helpful, even offered to fit the speakers in my helmet if I popped in to see them.
They suggested I remove some of the foam from inside the helmet, which I didn't want to do because I was scared.
After fitting, I found the speakers quite tight, and they became too uncomfortable after a long ride.
I then removed the thin layer of foam between the liner and the hard foam, and that made a huge difference. My ears still suffer a little after wearing the helmet for several hours, but I also wear glasses, so room around the ears is at a premium. I should really press the speakers into the foam a little harder, to hold them in place, but haven't been bothered.
Good piece of kit, IMHO.