Make sure you get a demo before you buy a solution. The settings and web interface to the managerial functions isn't something you'll deal with that often.
What you really want to checkout is how the interface to the logs themselves work. You'll be dealing with that multiple times a day. Some of my trucking friends tell absolute horror stories about the simplest of things like trying to switch from on-duty to sleeper berth, and editing the on-duty hours. Or what the stupid thing does with your duty status at midnight - that's a real tough one for software to handle, starting a new day, and resetting the daily clock to zero.
You want to make sure that interface works well.