It is my first Mechanical Keyboard. From Lenovo. It is for Chinese market only now.
Lenovo has two products. One is MK100, the other one is MK300.
The one I got is MK100, 199 Chines Yuan. Converted to Canadian Dallor, $40.
Let me copy description and features of it.
26 Key Rollover
My personal experience of it during past few days is good.
I use it on my Desktop, most time for typing, the primary OS is Windows 7.