I haven't seen it and probably won't. What I found very interesting was one of my team members with a 4 year old went. Said it was a good movie, but her son preferred Sonic 2. I looked up the opening weekend numbers, pretty funny/strange/odd that both Sonic 1 & 2 movies opening earned more than Lightyear. Disney is supposed to be THE story telling company, but appears they have lost their way.
Disney can spin it all they want but IMHO Buzz Lightyear is (was) Tim Allen. From a fan perspective, it was a mistake not to cast him.