The only problem I have with PhotoStitch is with some colors. Because of light, backgrounds do not always have a gradual change. To reduce this problem it is better to have more overlaps, more pictures in the stitch. As for the angle using a regular tripod it all depends on your lens. The best cheapest work around is with a Tripod Head
. I have a friend that is a realtor. He uses it in some houses. It is quick and since he uses only one lens he only has to figure the height of the tripod. Changing the camera angle is very easy.