I saw Superman Unbound. I thought it was decent. I really liked the voice work, especially for Supergirl. Bomer made for a good Superman too. Noble's Brainiac was just okay for me.
As for the story I thought it was stronger in the first part and petered out by the conclusion. But overall a solid addition to the DC animated films. I had almost given up on them, but I think I'll be coming back for more.