There are several issues with this package. It will break how things works if you use dependencies from the nova package library, It will not allow you any customisation, it will make your developers life misery.
I have built several projects through nova already. The only thing I would really criticize is the tedious work you have to do when implementing a well-planned database structure as you have to define everything in three places: The migration, the model and the nova resource. But also I don't see a way around that. Apart from that, there are some minor limitations here and there, but I always found a clean solution to workaround ongoing issues. Overall, I am very happy with nova and the work it takes away when setting up useful backends!