Since we've been usign v7, we have found the hi-liting of cells wonderful. You can change the colour and it looks classy.
In grids, the actual cells are hi-lited but not the grid rows and columns. For smallish grids, it's not so bad but it becomes less user-friendly for larger grids.
It also helps the respondent get through the answering of the survey more quickly.
I would love to see this implemented in v8 if possible.
What do others think?