Jose, I haven't had any opportunity to use XML-PRO, but we are very happy with Soundtrack Pro 2 (not version 1) and Logic 8 if necessary for our workflow. Particularly, we've been able to replace ProTools with Soundtrack Pro 2 for our needs which ranges from industrials to broadcast.
We had lots of problems with Final Cut to Pro Tools workflow. Ideally we should have bought the digitranslator, but didn't want to expense it since we realized how Soundtrack Pro 2 could benefit our already Apple workflow.
The problem we have now is many of our projects are in Pro Tools file format and we want to have them saved in an AAF, OMF or XML format that other programs can use. Essentially we want to be able to migrate the project files out of Pro Tools. I was just going to post on craigslist and see if someone could convert the files (source media not necessary) and email or FTP them back so we can use them in Soundtrack Pro or other audio apps.
Digidesign seems to nickle and dime for basic features and we don't like that. Nor do we like being so locked into their format.
Has the XML-Pro software worked well for you?