I had a largish sourwood get uprooted and I made turned parts for three rocking chairs from it. Before that I had only turned carving mallets and mauls for my froe from sourwood so this was a chance to try something different. I cut it in the winter and rived it into oversize blanks the same day. The wood is slightly interlocked, so the parts of the tree I got around to some weeks later were harder to split.
Over the next few days after I split them out I turned the blanks round and set them aside to dry before final turning. The shrinkage was definitely high. The parts I split out for splats and back rails twisted a good bit, too.
It turns fine, and it steam bends well. The problem I had was finishing. It took dye very unevenly and the grain is so subtle it disappears under a wiping stain or glaze. I solved most of that blotchiness by gluesizing after sanding to 220 grit. Even so, it's not a very pretty wood. The lower part of the log had some flame-like figure that I am not a good enough finisher to take advantage of. That being said, a good finisher could probably get a decent plain maple-like result.
In addition to the "bumps" sourwood trees have a lot of bends in their branches and trunk that might make some interesting curved parts.