Save YouTube videos as 3gp, mp4, mp3, or flv

I got fed up trying to find a decent way to save YouTube videos. I tried services such as keepvid, savevideodownload, and kissyoutube, but settled on Grab Tube. It is fairly quick, easy to understand, and lets you save video or audio as 3gp, mp4, mp3, or flv. The download itself takes a little longer than I would like, but for the convenience, I can wait an extra 3-4 seconds.
I recommend it.