I used the trial for a little while to test it for business. Seemed to work great although it only compiles the file at the end which takes ages. I ended up buying ishowu because it was cheaper and the file was rendered immediately. I would say that Snapz Pro is probably more feature rich than ishowu but I didn't really need the additional features offered so it wasn't an issue.

I also didn't like how it took over some of the existing snapshot keys.