They were excellent. The Code Prize does feel very nice in the hand. It feels solid, and the inner parts don't move at all as you'd expect looking at it. The Gyroid is remarkably small and delicate, and my son (the gamer) liked the Mario Mobious.
Another one: if I know someone's user name I can't add them through the "Find & Invite Friends" page under options, I can only do it through the explore page.
Also, the forced cropping of pictures taken outside of the app is by far the most annoying UX thing from my perspective.
I was thinking this same thing this morning as I tried to figure out where I needed to go once I got off the subway using the new google maps. This is a neat idea, but I wouldn't use it until I feel confident in the GPS and compass in my phone being accurate. Right now it's only right about 50-75% of the time (an one fo the times when it is notoriously bad is when it is finding its bearings after being without servie underground.)