It's superb quality.
Probably the most rugged light made, with awesome anodizing and finish, and is about bomb-proof.
I have the 3-cell model with the crenelated bezel and the Hi/Lo tailswitch, ZFL-M60-CS3D.
You're gonna love the throw with that M60 module in it. It throws 150 yards. Fairly narrow beam, but punches way out there, and is clean and great tint.
It's smaller than it appears to be in the pictures too. Very handy little size.
Once you get this light in your hand, you'll know it's not going to break. It's really solid.
I love mine, and I think it's a steal for what it costs.
You can use any of the Malkoff modules in the 2-cell model, except the new M91 which requires 3-cells.
You can buy spare heads, bodies and tailswitches, and they are all "lego-able". So if you decide to go with a 3-cell body later, that's all you have to buy. And you can add a clicky tailswitch or the Hi/Lo tailswitch later too.
Great system.