I've had the helmet a few months, and so far, it has been a good buy. It has been comfortable on 2 to 3-hour rides. The adjusting dial is on top of the helmet, which took some time to get used to since my last helmet's dial was in the back. The adjustment works well once you figure out where the dial is. It seems to adust more evenly around my head than my last helmet. I, fortunately, haven't had to test it out for crash protection.
The helmet isn't super light by any means but isn't bad for weight. The vents provide adequate airflow.
I wear a 7 3/4 hat, so I was concerned about the helmet being large enough, even in the largest size, but there is a little extra room for adjustment. There is even enough room for a sweatband underneath the helmet for the hot summer days.
Really great, helmet. Super simple to adjust. The only thing: I was on the edge between the Medium and the Large. I wish I would have gone with the medium, but I got the large as I thought I should allow room for anything I might wear underneath. It's fine, I just have to wear something underneath now.
The helmet is excellent on the road. It is light and airy. The adjuster on the top of the helmet is an excellent idea. One-hand adjustments on the fly are a breeze. Unfortunately, the helmet has two issues. The chin strap loosens constantly. Meaning: Every time you put on the helmet, you have to re-tighten the straps. During the ride, the straps loosen again. The adjuster on the top of the helmet also loosens, although not as frequently as the chin straps. So my worry is that the helmet might be too loose at that unfortunate moment when I might need it to be snug.
Very high safety rating by Virginia Tech tests. Chin strap adjusts easily. Head size adjustment reasonably convenient with one hand. Highly satisfactory and a great choice. Lazer has over 100 years in helmet manufacturing and does it well.
Whenever I ride mu Bianchi road bike, my new helmet is on my head. It's not constricting in any way, and is quite well ventilated, very cooling.