Also, if Grid ends up too big in the infopanel box you can always drag it out for those big 25 man runs if like me you preferred to see the full name and not just 3 or 4 letters
That said, when I tried Clique myself I used to use left and right for the healing combos and ctrl left and ctrl right for target and menu. I eventually found it too cumbersome for me and moved onto healbot. There I noticed some important factors that didn't appear in healbot so switched to grid.
Played with both for a while as I went through the transition period and now grid is pretty much my favorite click heal addon. I used it in conjuction with 5 macros on my action bar and could technically get rid of grid for healing purposes but the little icons that appear all over the show in grid help me see who needs healing and such. In a 25 man raid the normal nUI frames aren't quite as useful in those cases with decurses and hots etc