Feel-good-ism decorated with an occasional sprinkle of Bible... according to The Internet Monk. I would tend to agree with him. The only times I've watched Osteen, I've been wondering when the Cross would show up in the message, since that's the central truth of Christianity.
There are lots of mega-churches who preach an unwavering Gospel of Christ. His doesn't seem to.
Run, don't walk, away from it. It's as Paul described, "preaching a form of godliness, but denying its true power" (2 Timothy 3:5).