I hate it! It's really difficult to get a 4x5 challenge -- in fact, even tho' i click multiple times on new games, I have yet to get one. The 4x4's that are labelled "quite difficult" are not at all. At least with the old format, i could click multiple times on "new game" and get a 4x5 challenge once in a while. I'm wondering whether something got messed up in the change.