You can comfortably download it and watch your favourite content both free and paid. Do keep in mind that the free content are mainly older but big titles. It does have all the newer titles but you will need to rent them for a small fee.
The app has a well put layout with all genres from action, horror, thriller, comedy, documentaries and so on in high definition.
What you need to keep in mind is that Vudu is available in the US only. So to access it you will need to use a VPN and virtually change your location to US. This tricks the app to think you are login in from the US.