The stability of the solution is okay but it is not great when you compare to Tableau. 

I know that it has been slow in the past when it was refreshing data from a database, but with what I have been using with an Excel sheet, it has been fast.

It's quite a stable product. The bugs we found were not necessarily to do with TIBCO Spotfire itself. The DBA can change the credentials, or location of the database, and then we're  unable to generate the report. But this is something they should have communicated with us internally.

This is a stable solution.