So far, we haven't found anything we need to do that cannot be done with the .net tools. However, the .net tools are underdocumented and at times frustrating. I have used Wise in the distant past and also a couple of lesser known installers. If I found something needed installing that would not install with the .net tools, I would consider writing a C++ program to get the job done before I would consider Wise or InstallShield.