The IBM Integration Bus is a very strong, very easy-to-use product.
We prefer it due to the fact that we can get support from IBM when we need to, as opposed to using open-source tools that do not have support.
Sometimes companies have systems from IBM, Oracle, HP, et cetera. IIB is a good candidate to enable all heterogeneous systems to exchange data smoothly without any effort.
The product is a user-customized tool so that you can adjust it to your specific needs pretty well with little trouble.
The initial setup is easy.