So far so good, Only been a few weeks and 200km. Works fine, smooth, accurate, and responsive shifting. Couldn't ask for anything more. Should have purchased this shifter years ago.
I purchased this to replace an existing XT mech from a few years ago. I thought the old mech was working fine until I fitted this, which I considered an indulgence if I'm honest! Changes are now snappier than ever before with clean precise shifting in both directions and with less effort at the shifter end of the business which are recently fitted XT770 shifters.
The only down side, and it is minor, is the need to break the chain in order to fit the unit, but as I said I'm nit picking here, I'm simply used to unscrewing the guideplates!
Fitting and setup was easy and painless due to following an installation video on youtube. I'm not an experienced bike mechanic so no specialist knowledge was required, and the only specialised tool was a chain breaker (and fixing link) which most serious riders should carry in case of emergency anyway.