I just replied to a similar question in another thread. It totally applies to this thread to so I'll just paste my same reply here too.
Here's something that you need to consider before using any automation tools. All they are designed to do is let you scale up your efforts.
If you know what your doing to build good backlinks then automated tools will just make some of the tasks you do easier. But if you don't know what your doing and aren't able to build good backlinks on your own, then the automation tools will just make that easier as well.
In other words, if you don't know what your doing then tools like Scrapebox and Xrummer will just be scaling up your unsuccessful tactics. If you take the time to learn how to build backlinks manually and learn what really works best, then you can use automation tools to scale up a successful strategy.
Tools like Scrapebox, Xrummer and others aren't a magic bullet that will gaurantee success. Just like any other tool, they won't be nearly as useful until you already know how to do the tasks they're designed to help with.
If you already have 10 years in SEO, and have been doing all your backlinking manually then you probably know more than enough to use automation tools without causing any damage to your sites. Just use them to reproduce pretty much what your already doing and then after you know they are producing what you want, then start scaling up your efforts.