i have one with my hexa/y6. initially i didnt like it, the dx8 just looks anf feels better, but after some time with it, it's grown on me.
its smaller than the dx8, as is it's screen, but the blue backlight is very good.
there's loads of menu stuff but the mk wiki pages are actually useful in helping you set it up correctly.
i had a bright idea to use the hott smart box as a second screen, but in reality it doesnt work asi'd hoped. it mirrors the telemetry screens, but doesnt display regular menus screens. the mk telemetry screens are located within a sub menu, rather than being the standard screens, so the smart box just displays an error message. i'm sure graupner/mk could sort this with a firmware update.
i've also kept the centre sprung throttle. hoping to actually fly my mk droidworx conversion in the next few days, so will quickly find out whether or not the spring is good or disasterous.
all that said, only wish jeti had got their radio out sooner :tennis: