I used it several years ago, and it did ok with simple panoramas. For large panoramas, I used
Hugin.
In the meantime, I shifted to OS/X, and at that stage, Hugin wasn't too stable on the Mac platform, so I bought Autopano Pro. I used that to stitch a 320 image panorama. Since the 2012 Hugin release, the stability improved, and the wizard works very well in most situations.
I'd recommend giving Hugin a decent try, and read through the tutorials. Best of all, it's free! If you don't mind spending some money, I can recommend Autopano Pro.