Neil - Live Chat does come with a "Help File" that opens both independently and in-program. As far as ease of use, I played around with it and found it easy enough to install and use. However, there have been some users that had problems. I don't really know if those were true problems, or if they were operator errors as I haven't really followed those threads.
Best bet for you would be to download the trial version. Install it, and try it out. If everything works out, then you can purchase. If you have some problems, you can post here and open a support ticket. One way or another, if there is a solution to any issue, those are the best ways to find it.
Living the dream, stocking the cream