I recently ponied up the $100 for these two applications and while they aren't perfect, they are very useful for me. I would highly recommend the free trial as you will get a chance to see if they meet your needs.
I have seen some criticism regarding the lack of integration with a desktop application, but this isn't a big deal for me as the BB is the place where I need to have access to the info (and the place where I typically input it) since it is always with me, unlike my desktop or notebook.
I have experienced a few bugs, but it is a beta release and I will say that Rex Wireless seems to be very responsive to support issues, and very receptive to product suggestions.
For me, the ability to more effectively manage tasks, along with an application to harness my "stream of consciousness" thoughts are very helpful. As always, YMMV.