IBM Infosphere Information Analyzer, particularly its latest version, has some stability issues. My company faced some serious issues with stability and had to repeatedly go to IBM to have the issues fixed.

The tool sometimes crashes or freezes. But the latest version, 11.7, is more than stable than previous ones. 

If it is set up correctly, then it will work properly. However, if it is not set up correctly, there may be issues with large volumes of data. In addition, the patches must be updated regularly, and you may be in trouble if you miss any updates.