Looks nice. The only things I would wonder are: 1) If you're standing in the deep part would you have something to lean against (and set your drink on) or are the bottom/sides always curved? 2) I would hope that the umbrellas/etc could be moved around to provide direct shade when I'd like it.
It hit 88 in Minnesota yesterday (after snowing a foot two weeks ago) so I'm ready for that to show up in my backyard. :)