There are benefits that would be a lot harder to realize on your own. The automation; keeping track of both how often someone takes/doesn't take an action + the implied strength or weakness (hand isn't shown, but they acted strong or weak) and ability to see hands they actually showdown are nice.
You can see all of your hands, not just from this point on.
You can do analysis on the player pool, to see what the average reg does.
In 2.5, there will be timing tells
for some sites.
As with any software tool, you should use it to aid, not as your entire reliance. Nothing will replace watching how someone plays. You learn so much more by observing them and studying them in reports.