Until about 7 months ago I had 2 main helmets that I'd use. An oldish Shoei RF800 full face and one of those dubious novelty low profile things that are not compliant to the legal standards.
Preferred to use the full face one on long trips and the other thing for just general running around.
A mate had just bought an open faced one with a visor (might have been KBC brand) and was saying how happy he was with it. It was also a legally compliant one. He said it cost just over a hundred bucks and he got it from a particular m/cycle shop in town.
So, went into the shop to try out the various size KBC ones and none of them fit my noggin with any comfort.
There was a Shark RSJ open faced one with visor also on the rack and it seemed to fit like a glove. It was more expensive at $330 but the salesman guy said it is a far superior helmet as it was French not Chinese made and was constructed from fibreglass not molded plastic. So I bought it and here is a brief review after 7 months of use.
Appearance wise I guess you could say it has rather pronounced projections on either side to help protect ones jaws. There are 2 buttons/switches on the sides to either turn internal airflow on or off. Cant say that I have noticed much difference which way they are turned/pushed and there was no information booklet in the box the helmet came in to say which position was which. It is an open face so that is no big deal, your face gets lots of ventilation.

What I liked about the helmet when I first tried it on was how light weight it felt. It seemed much lighter than my Shoei. Today I weighed my 3 helmets and was surprised that the shoei full face was not that much heavier.
Shoei full face, 1630 grams
Shark RSJ, 1514 grams
Silly Novelty one, 735 grams.
The shoei feels heavier than that when riding at higher speeds as the wind tends to get under the chin support and lift the front of the helmet upwards. The Shark does not seem to do this which is a bonus.
As for quietness the Shoei wins which is really to be expected as its full face. Gotta say I'd normally still wear earplugs with either helmet as my HD has a bit of a note.
Took the missuses new Triumph bobber for a spin the other day and forgot the earplugs. It is a pretty quiet bike,  the wind noise in the Shark was not too bad at all.
One concerning (to me) aspect with the Shark was when I took it out of the box the visor had a sticker on it that said "this visor is not shatterproof". I don't know if other helmets come with this warning?. I guess if someone throws a brick off an overpass and it hits you in the face at speed, a lot of visors might not be shatterproof.
This helmet also has a hidden sun visor that fits between the main visor and your face and is operated by a lever on the left side of helmet. Which would be handy if you forgot your sunnies.

Back to the main visor. It clips on and off with relative ease. You just have to pull the visor in a forward direction and it clips off. Then you just have to push it back a bit harder and it clips back on. It is almost too simple a system of visor release.

Probably the most annoying feature/fault with this helmet is the straps that hold it on to your head. They are the "ye olde worlde" style double D type ones that have until recently been on many helmets. Who ever drew the blueprints down for this helmets straps had a bad day. They have a habit of doing this when you put the thing on...(see pic below)
One of the D shaped buckles tends to get lodged the wrong way up into the helmet lining and it is a cunt to get the thing back out without taking the helmet off and for some reason when you do the easily detachable visor come off in your other hand. This has happened on several occasions with me and it shits me.

It is a real pisser and almost the only thing I could fault the helmet on.
EXCEPT for the other end of the chin strap which is incredibly short. I can only just feed it through both double D buckles and I am not really a fat necked bloke. There is a plastic loop for the excess strap to fit into but the excess strap does not reach the loop by a bout 30mm.
Aside from that replacement visors are about 30 bucks each which is less than half the price of Shoei ones.
Out of 5. I'd give it a 3.5.
There ya go......anyone else got one and what do ya think of it.

Thanks for the good review FC.

So FC, a couple more months of use any more observations to pass on?