Ratings on products are pretty much just varying opinions; many people don't consider the price of a product when rating it overall--they strictly rate the quality, which isn't fair in my opinion.So, for the price, this helmet gets the coveted 5-star rating from me.  But barely.The good:  The helmet is DOT approved, lightweight, fairly well-ventilated with one vent on top that allows air to blow between pads/foam in the top and over the top of your head/hair, and one vent on the bottom that splits left and right into two areas of incoming air on the inside, which are lined up approximately just below the corners of your mouth, and are composed of a few tiny little holes.  I have already used the helmet in 90+ degree, humid weather, and it keeps you cool when you are moving, even with the shield down.  The shields are nice and do their job, with good visibility and no distortion.  They are easy to flip up and down.The bad: I went with my gut and ordered a size larger than the seller recommends, and thank gawd for that because it's snug.  But snug is good; a good helmet fit will allow very little movement of the helmet on your head side-to-side and front-to-back which you should test when you get it.  You should be able to fit 1 or 1.5 fingers between your chin and the front of the lower part of the helmet, one finger or less between your temples and the sides of the helmet, and the same for the the area between your upper forehead and the front of the helmet, BUT it shouldn't be so snug that you get a headache or red marks after 15mins or more of use.  So, I believe the seller's sizing chart is wrong.Next, although the shield's quality is good, the directions for swapping the shields flat-out suck.  With the new version of this helmet, you DON'T need to change any screws/brackets; it is the same bracket for both shields and no tools are needed.  However, you'll see things in the instructions like (paraphrasing) "Place shield in position C" when there IS NO POSITION C in the diagram.  So, here's the trick to swapping shields: study the very small slit in the circle that the screw is in; understand that as you tuck the "fin" in, it can't just go in that general area--it has to go into that very fine slit.  Once you've done that at about a 45-degree angle, with the face shield sort of in the half-open position, it's a breeze (I would have said snap but I don't do puns... then again, breeze?).  After you get used to that little trick, it's easy to swap shields, although the dark one isn't that dark and I will leave mine on night and day.  When you have the helmet on, flipping the shield down sounds like a jackhammer coming down.  Also, there are some mild air leaks around the shield which doesn't bother me at all.I ride a 50cc scooter so I'm satisfied with what this helmet will do for me.  I've read peoples' testimonies about how this helmet saved their lives, but frankly, if I'm going over 60mph, I'm looking at something a little more well-known.  For me, the comfort works, the ventilation is adequate, it's DOT-approved and it is rather handsome from any angle.  For the price, to get all that--that's a good deal.  Would recommend to anybody doing less than 60mph.