Yes, as far as bike helmets are concerned, I think this is one of the more comfortable and better fitting I could find. You see, I am a bit "hair challenged," which makes wearing any bike helmet problematic. Most bike helmets out there (Giro, Bell, etc.) have a strap system that uses a "three point connection." The strap connections in the front of all of then are on either side of the helmet shell, and are no problem. It's the rear strap connection(s) on most helmets that is the problem for me, for most often there is only a single connection inside the center of the helmet shell above the rear of my head. It is this connection point that is the problem -- it is very irritating! This is where the "four point" strap connection used by the Giro Xen Helmet is SUPERIOR! All four strap connection points are on the outer rim of the helmet shell, and are not a factor that affects comfort or wearability. It was the Giro Xen's "fit" AND "comfort" that were the reason I spent the extra money for my large (adult) sized helmet, rather than going with the more budget friendly ones. It comes with a snap-on visor which may or may not be used -- you decide. The Xen helmet is not adjustable for a wide range of head sizes. It comes in different sizes (Small, Medium, Large). Pick the one that fits the intended wearer best.
This is not to say that bike helmets, even the Giro Xen, are comfortable in every way. They all are hard even on the inside. Yes, they are filled foam, but the foam is by no means soft! It is put there for protection in the event of a fall, not for comfort! Comfort, such as it is, is provided by a small amount of thin "padding" that is held in place by tiny bits of velcro. I guess this is supposed to make it easy to remove the padding for cleaning. In my opinion, the Giro Xen has a bit more of this padding than most other helmets I looked at, and I looked at several brands and styles. In addition, ventilation and air flow through the helmet is satisfactory (it's similar to most other helmets). The only time this could be a problem would be for anyone, like me, who wants to ride in cold weather (might want to wear a cap inside the helmet, or find some sort of outer cover for it).
If there is a weakness to the Giro Xen (and almost all other helmets), it is (for a lack of a better way to describe it) the adjustable "suspension" system inside. It, like the helmet, is designed to be very light weight. It's appearance does not create confidence in my mind as to the overall quality of the product. Will this helmet last a long time without falling apart after a few months? Only time will tell.
The Giro Xen also "fits" my head better than most other helmets. Before you buy, especially on-line, go to bike and sporting good stores, and try them on first. You will find that some do indeed fit better than others. My RECOMMENDATION is that you never buy a helmet "blind!" Try several and see how they all fit and how easy it is to make adjustments before making a decision. Is it stable on your head? Is it comfortable enough so that you will use it all the time? Are the straps, etc. easy or difficult for you to adjust? When trying on a helmet, are there any pressure points that could be an issue with prolonged wearing? I must say that my helmet fits well enough that I am generally not aware of it while out riding -- which I appreciate.
If I could make a recommendation to bike helmet manufacturers, it would be that they make helmets that fit a wider variety of head shapes, because God did not make us all alike, even in this part of our body. Some heads are more round, and I think most bike helmets are made for a more round head shape. My head isn't, so I had to make the best choice I could -- and the Xen was the best compromise in shape, without the discomfort of the straps rubbing on the top of my head. But, I had to pay a few more dollars, which I hope was worth it.
One more thing. If you, the reader, are looking for a helmet that are a little more conservative in shape and color, you might like this one for that reason also. Giro calls the Xen a "mountain bike helmet" as opposed to a "road bike" helmet, which is the basis (I supposed) for its particular style and its color choices. The one I bought is the the "matte chalk/white weathered camo" color. There are a few other colors.