We are using paxScript by Alexander Baranovsky in our main product in order to provide custom behavior. Our product has been deployed in hundreds of locations and paxScript engine proved to be very robust and reliable. Over few month of heavy use (all installations are working on 24x7 basis) we did not have any failures due to paxScript engine. It also provides high degree of integration with the application code.
We would highly recommend this product for use in applications that require high degree of customization.
K. Poukhov, CTO
EXSOTRON Corporation