I don't need any other helmet- this is light and fits my head. The hole at the back fits a pony tail great so I don't have to deal with my hair flying in my face when I climb. I don't think this is intentional, but it is a nice feature. The straps take a bit of working to get this helmet to fit your head perfectly, but so far, it is the only helmet that does not immediately go cock-eyed on me.
It make me bring a helmet when I normally would not.

So light, does the job perfectly...2 small problems are that it is a clean, comfortable and snug fit so it is hard to put a hat or hood under it for winter climbing, and it is really big looking, so I don't think it's the styliest helmet around (but does that really matter for a helmet?!?!?!)

This is an awesome all-around helmet. Super light! I use it for rock climbing, ice climbing and ski-mountaineering. It is a lot lighter than my normal ski helmet which makes it an ideal choice for ski-mountaineering. It works well with goggles or sunglasses. Plenty of room for a beanie underneath when it is cold. Really easy to adjust the size on the fly.

I don't need any other helmet- this is light and fits my head. The hole at the back fits a pony tail great so I don't have to deal with my hair flying in my face when I climb. I don't think this is intentional, but it is a nice feature. The straps take a bit of working to get this helmet to fit your head perfectly, but so far, it is the only helmet that does not immediately go cock-eyed on me.
It make me bring a helmet when I normally would not.

I used to ski tour with the BD halfdome climbing helmet. The Tracer feels much better though. It moves less when I move, and it seems less likely to catch its rim on snow or trees if I were to take a fall.

Very light, comfortable, out of the way helmet. Great on Ice.

I love the Black Diamond Tracer because it comes in three sizes! I have a BIG head and the Tracer is the only helmet I can wear all day comfortably and feel like my whole head is in the bucket.
If you have a big head, try the Tracer Large.

Great rock climbing helmet, super light and fits tight. It's ok for ice in my opinion, as soon as you put a hat on under it the helmet starts to ride high on my head. I wont take another one of these on a big trip either, just the plane ride crushed one and on another trip the constant punishment from being tossed around in the backpack trashed it. Overall though, it is my helmet of choice for any non-alpine venus, but if you need a helmet to last for years keep looking.

I have a 22 inch head and i got the medium. Had to return it for a small. Other than that works

Helmets are key but many forget they are only good if you have them on your head. Bulky, heavy, and poor ventilation all are good reasons to not wear the things. Not a problem with this rig where once it's on, you nearly forget about it until you need it. A bit $$ and more delicate that the Half-Dome, it serves a good purpose as my "everyday" helmet on all but wall's. My one gripe, the headlamp clips don't inspire confidence.

The tracer is a fantastic helmet for all variety's of climbing. I have used it trad climbing, ice, and alpine. Nothing bad to say about. The perfect helmet. The sizing is standard and a medium size will fit nicely on an average sized head.

This helmet is pretty sweet, I can't see how you could ask much more of climbing helmet design. The suspension system is totally dialed, it's very light, and the venting is great. You'll make fun of your buddies still sporting their Ecrins for looking like cavers. Not that there's anything wrong with that...

I'm a pretty big BD fan but I did try on a bunch of other helmets. This had the best craftsmanship and actually fits the head. The other's I tried felt like buckets with a strap system inside.

too light :-)

The helmet fits great, stays snug on the noggen, super light and breathable, it has lots of adjustability. I've got an average sized head and the medium fits great, I used to hate wearing the old school petzl but I can even wear this thing around the house!!

super liteweight. So comfy Its like wearing a baseball cap and you forget that you are wearing it. Breaths nicely. A medium is a little big on my 22in around head. The adjustability is also nice.