I wear a Zeus modular helmet. Cost me $89 from some web site that I can't remember. Mine is the newer modular model that has vents on the top.
It works but is obviously an inexpensive helmet. I have to tighten the screws that serve as hinges for the chin bar about once a week. Easy to do with a coin, but it is annoying when the chin bar flops down unexpectedly. And it makes a lot of wind noise. The wind noise is common with modulars and I don't know if the Zeus is any worse than others.
On the plus side, besides the price, the shield detents nicely in several different positions. The fit and finish of the exterior is good, the strap and D rings are fine and everything works.
The obvious question: Would I buy Zeus again? - Well, maybe. My Zeus fits a little loose so I'd try the next smaller size. If it fit well I'd buy it. Otherwise I'd look for something that fits better.
My wife is looking for a new modular helmet right now and Zeus is on her list of possibilities.
If I could use a full face non-modular design I'd buy a Scorpion. Two of my daughters have Scorpions and they are very nice helmets for well under $200.