I have the MX Vertical from them, by far the best mouse I've ever used, bluetooth or proprietary wireless, sensible place for the charging cable to connect (rarely I might add).

I also have the Lift vertical, for use when travelling, but it's not nearly as nice as the MX.

edit: also the Ergo keyboard is fantastic. I can't overstate how using ergonomic keyboard/mouse is important; you're using them basically all day.