Had one on Demo and the Missus has one (my new frame will also have one)
As above the 3 settings are the main difference. My current RP is good but is lacking that setting between On and Off – I run the PP too soft for climbing to give some better platform on the pedally bits with more give for rough stuff.
I rode the CTD in trail 90% of the time and it was perfect, enough movement to be good, enough platform to work. Climb was an out and out lockout and D was full open fun.
However there seem to be a lot of tunes about and some done seem to be as distinct, this may be a fault in the shock or just a poor tune spec.
If it’s for the Nomad I’d try and get on one that is fitted with one, see what you think and get the same tune ordered/set-up for you if you like it. The Blur LT tune is good on the Missus bike. (though some of that is the suspension design)