Karsten,
I haven't used this tool very extensively, but if you wanted to try before you buy, we might be able to arrange something. For the situations I have used it, it works very well once everything is configured correctly. Configuration isn't the easiest thing in the world, but once it's done, it's done!
Matt Faus / Microsoft InfoPath MVPQdabra® Software / Streamline data gathering to turn process into knowledge