Migrating from 1.5 to 2.5 is a serious undertaking, especially if you have a lot of components. I tried jupgrade with no success and so went this route. With components especially (CB, JComments, etc...) you will need to upgrade to the latest version on your 1.5 installation and then export the dbase fields to your new 2.5 installation. But that said, the developers were very helpful and extremely prompt with followups to my questions and technical difficulties. They went above and beyond to help me track down issues that were cropping up in the migration that wasn't directly connected to their component. The money spent on this product and the support is well worth every dime!