I used to use autopano giga and found it worked really well until quite recently i was having to stitch shots where the camera was very close to objects such as railings, bars and i was getting awful stitching errors, i put it down to my settings on the lens rail and then after having a chat with Trausti i tried PT Gui which after a short learning curve found that it stitched these previous shots perfectly so i have to admit I am now a convert after two years on autopano giga!