I have a pretty simple need for keeping track of users at a shared vacation home. I had been using a hosted service, which had a number of pretty serious flaws, and looked at a number of other options to do this. This is a great solution at a realistic price. And Vince (as has been noted on other reviews) does a great job of responding to questions and issues quickly and accurately.
I struggled a bit getting it installed but not because of bugs or flaws.