I've come from a traditional auto box (Mercedes AMG) and have to say the e-CVT box in my RC300h is sublime, a real dream!
I really must be missing something because when in 'Normal' drive mode (with no rev counter displayed) I really cannot tell what the revs are doing. If I switch to 'Sport' mode (where the rev counter does display) I can see the engine revs rise and fall, just as they do in traditional autoboxes as the artificially created gears change.
Bottom line is drive the car just as you would any other, the car's systems will keep the revs in the correct range for the load demand and rest assured the engine will not explode!
E-CVT is the transmission of the future, so much more reliable than other autoboxes. Small and relatively simple. No cogs engaging/disengaging, no clutch or brake bands to wear out.