1st slushbox I've ever owned and only the DSG was good enough to sway me.
D = lazy auto driving for traffic and cruising, knock it in N and use the handbrake when stopped BTW.
S = well, I haven't actually found a use for it yet, it's D but more frantic.
M = full manual control, so long as you don't hit the limiter, it'll stay in the gear you choose giving total control. There's remaps in the pipeline to fine tune it further to your requirements.
I haven't heard of clutches wearing either.