FileMaker has a pretty rigorous criteria for FileMaker trainiers and they list the approved trainers on their web page at http://www.filemaker.com/support/training/authorized_trainers.html
Soliant is one of those trainers. I've only had training from MightyData and they did an excellent job. One of the MightyData trainers who trained myself and some other staff was Martha Zink and she did an excellent job. However, she now works for Soliant. So indirectly I will assume all her training skills are intact in her move over to Soliant <grin>. I personally would recommend either MightyData or Soliant to anyone needing training.
Generally I find training to be what I consider expensive, so I usually try to brush up ahead of time to make sure I'm learning the most I can during class time.