I had maybe 4-5 consecutive flip-up helmets over the years.  I liked not having to remove my glasses.  And I liked being able to flip it up right before sneezing.

Last summer, the night before a multi-day trip, the latch got jammed and the helmet wouldn't open anymore.  I ended up buying a full-face with retractable visor and I don't regret it.

I've had other flip-ups helmets quit latching right on me before, sometimes just from getting knocked onto its side.  I also got tired of slamming it down across my face all the time, and then always checking to make sure it was latched right.  My last one was a real PITA to attach my BT com, because the flip-part took up most of the side of the helmet.

Sure, it's nice to flip it out of the way when stopped in hot weather - but it does make you look stupid when it's up like that.  Yes, really. 

I can deal with removing my glasses and sneezing onto the chin bar.  I can deal with not worrying about the latch.

Like my Multitec but it's noisy. Might try the Shark next time.

Like my Multitec but it's noisy. Might try the Shark next time.

The Sharks are cheap right now because they're on closeout. I guess they're coming out with a new model. I have one, but I'm in the same place as vulcanbill -- I haven't worn it enough  to make a judgment. The Multitec is much more comfortable but that has more to do with the shape of my head than the design of the helmet. Whoever designed my skull was an amateur.

I don't think it's much quieter than the Shoei, but I'm on an FJR with a large aftermarket screen. Not a good test bed for comparing noise levels.

I have the Shark Evoline 2 and the jury is still out.  I haven't done enough riding to really spend any quality time with it.  It's different that a flip up in that it's a true convertible helmet.  The chinbar actually swings back and sits on the back of the helmet.
So basically, you can ride at speed w/ a 3/4 helmet configuration without having your head torn off.  It's heavy but when riding around town it is nice to just flip it over and be in 3/4 mode.  Back on the highway, just reach back and flip it down and lock it.
The locking takes more than a standard flip helmet to latch as there is a down movement then a back movement to fully lock it.  I need to spend more time with it to give a fully informed review.  And since I'm a bit of a helmet whore, I have many choices.  We'll see.

http://www.webbikeworld.com/r2/motorcycle-helmet/shark-evoline-series-2/

There are newer models out.

Interested in your take on this one. Looking forward to a "fully informed review"

I wear both types. For serious, long haul riding, it's the Schuberth S1 full-face. For local, go-fer runs, it's a Nolan N-103. I also have a Caberg full-face (great sun visor, noisy and poor ventilation - OK for longer local riding spring and fall) and a Caberg Justissimo (great sun visor, noisy, poor venting, now sitting in its box). I've also worn Schuberth C1 & 2. I sold both (mostly noise issues and some fit concerns). The S1 is the second one I bought. #1 wore out. #2 is the Druidi (great graphics, with reflective bits), which is beginning to show its age. I'll miss it when it's time to hang it up.

I agree that flip-ups are better with on-and-off situations. I have yet to find one that's quiet enough, even with good phones or plugs. Ditto for really meaningful ventilation. My K1200RS, with the windshield down gives lots of air flow that, AFAIK, isn't all the chaotic. NTL, these helmets are generally too noisy for slabbing.

The S1 is the quietest helmet and has fair ventilation. I wish I could find a quiet, well ventilated helmet with the Caberg silvered sun visor (most internal visors aren't dense enough for my needs). I wish I could find a pound of $20 bills, too. 

PS Yes, I wear glasses.

Glasses wearer that wore Shoei RF's for years. Was a firm believer, amen. Then tried a modular. Never going back. Evah. Not gonna do it.

Wind noise? Just don't wear earplugs. The tinnitus will cover up that wind noise just fine in no time at all.

Just got an N104 with Ncom. It remains to be seen whether I can connect more than the GPS. I've never thought it was a good idea for me to have distractions while riding, but long hauls on the slab might pass more quickly with some music. Not sure the Ncom will do that.

I was rear-ended at a stop sign once, while wearing a flip face helmet.  I went over the bars and landed on my back when I tucked.  I hit the back of the helmet.  The flip face stayed latched and operated completely normally after that.  That's about the only data I have on it.   I still prefer flip face helmets for all the reasons listed.