Would you like to sync the version on your PC with the Steam Cloud...
OR
Would you like to sync the version on the Steam Cloud with your PC...
OR
Do Nothing.
I wrote this post intentionally like this. I was playing Borderlands 2 the other day, and for whatever reason at some point yesterday, the last session I had didn't sync. What you see above is pretty much verbatim what the Steam dialog box said.
Better yet, it also tells you if you sync one way or other, you may lose progress in the game, but nowhere does it tell you WHICH SAVE FILE IS NEWER so you can at least try to make an informed decision on which one to overwrite!!! Because that would absolutely and totally NOT be useful at all to determine which option to chose, would it?
Also, it doesn't tell you at all that choosing "Do Nothing" means you don't get to play at all and it aborts launching the game completely.
I don't think they thought this one through very well.