I have had the pleasure of working on both companies controllers. My biggest issue is the lack of troubleshooting access on the TX' s and like Abe said, if software is needed for any future upgrades, your gonna pay through the nose as well as waiting on Schindler to get around to it with the tool they use. They bring an Sim card with them so they can load and adjust them remove it when they are done. The TX' s are a very good running system once setup right but MCE or GAL have alot more freedom for changes and add ons.
Hope this helps!