OK, I have 2K on this helmet now. Here are my thoughts:
They run SMALL...I'm right in between what they said was a L and XL and it is a tight L, but an XL may have been too loose with break in. (Not their fault, but an FYI)
With the speakers in (I have the Mag9 SENA with the speaker pods) I have to make sure my ears don't fold down, not a huge issue either, but it's all "how" I put the helmet on.
The LINER doesn't "wrap" around the inside of the FOAM inside the helmet on your forehead. The inside LINER is like a "beanie" vs. my old NOLAN which the liner wrapped around and snapped into the helmet. Only issue is the liner has a RIBBED edged (like a microfiber towel edge) and I have to make sure it's pulled down or it digs into my forehead. Nothing "painful" just annoying. If you put the helmet on right it doesn't ride up and happen.
The functionality of the helmet is great. I'm right in between needing a larger windshield on the highway and NOT on my SERG and with the clear shield down it's fine. I also have noticed so many "rock/bug/derbies" hits to my face over the years I prefer at 60 MPH to have a shield, which is why I wear the 3/4. Everything works as advertised. I leave the helmet pretty much set up as it comes. But you can change it "8 ways" they say.
Over all the helmet is a great value for the money. Is it as nice as my old Nolan? No, but it is a good helmet for the money. It functions well, the Sena10 mod is great. It's not hanging out as far, mic fits nice, etc....so all in all I would recommend it and I'd buy another one.
SENA 10 kit: The Communication portion works very well. My wife and I had a Gold Wing before and were spoiled with the wired J&M headsets. But these work well for talking. I use an iPhone5 and I can answer calls (though I don't usually...why ride if I have to answer the phone?), but I've tested it and under 55 with the face shield down it does work surprisingly well. Another cool thing with SIRI is I can send text messages and SIRI will read them to me by saying "read new message". I can also reply (did this in slow moving traffic when a group was waiting for us). FYI: once the "new" message is read you have the option to "repeat/reply" but after you let that time lapse...you can't re-read old ones...just an odd thing I've learned.
For Music? Meh...they are SUPER loud, but tinny and no bass. I'd like to improve the faring speakers, etc...but I listen to the SPEAKERS vs. the Headset 90% of the time. At lower speed they work, but the quality isn't good for music at all. I just noticed today they have an "ear bud" plug they JUST came out with. That's "illegal" in some states to use IN EAR buds...but that would solve tons of "music" issues. Again...plenty loud...just not deep enough to be pleasurable.