2 features I hadn't noticed prior to faster box:

1: starting off with a small 'trial selection' using +brush (a bit like the flower in Nikon tutorials), you can then set the adjustment (or a series of linked adjustments) on the basis of the trial. You can then carry on brushing ad lib and/or check the extent of the mask using mask or overlay. Trying to add or subtract after choosing an adjustment was the surest way of crashing the programme before! You can also dab/undo/redo and use pressure settings. Never realised how accurately a PP 'brush' could replicate real one. Nice when choosing exactly how much/little of an image actually needs sharpening. (Don't tell me, all Photoshop users learnt this in the cradle).

2: used to think the temorary reset of individual panes within LCH was something that just didn't work - it does, toggles between before and after