When you've had as lengthy and successful a career as Rod Stewart then you can convince your fan base (as wide as it is) to buy what amounts to a CD full of songs they already have and a DVD full of videos they have already seen plenty of times.
You have to give props to the wee Scottish lad as over the past 40 years he has recorded many albums that have created more hit songs than most. The music spans from 1971 until 2004 and includes some of his solo work as well as his stuff with Faces. You could argue that some songs are missing, but there will always be an argument when you have a catalogue this large.
Yes, there are other 'Greatest Hits' packages from Rod Stewart, but none as complete as this one. So if you were going to buy one then this should be the one.