I got tired of all that despising PRINCE2: they say it is not a project management methodology, they say it is subordinate (e.g., it must work as a subordinate tool) to PMP (by PMI), and so on. All those “allegations” are just that, allegations: PRINCE2 is probably the best project management methodology one can find, it is an alternative to PMP, and so on.
I chose PRINCE2 and I am even more convinced of my choice now than then.
PRINCE2 is more innovative and very practical (with a practical manual), PMP is more a collection of information; mind, this is my personal opinion.
Besides, the British government “owns” PRINCE2, while PMI is an association; that can be very important, even from a formal point of view.