A good turn-down will put out clean towels, take away used ones, empty wastebaskets, tidy up the room, turn down the bed, put out service items for shoe cleaning, breakfast etc., turn down the lights, draw the curtains, replace ice in the bucket, and NOT turn the radio/tv on! We have found lately that a lot of hotels do not put the bedspreads back on the beds during the day, only using clean duvets - and if they do, they only put it on half way. The FS especially seem to be doing this. (If you want to take a nap, you don't have to remove the whole thing).
The only problems we have is with early turn-down, sometimes they come before you have dressed for the evening. We now tell housekeeping when we arrive what time we want turn-down. All in all, I like coming back to the hotel to see everything tidy and ready for bed!