[Serusers] witch RTP solution is the best?

[Pol]

Hi Users, I should implement any RTP proxy solution for our SER
deployment to avoid NAT problem.

I have tried to look for in google some non subjective reasons to use
Mediaproxy or to use RTPproxy but I have not found anything.

I would like to know which solution is the best one, which one is most
common or witch one are you using, how it works and if its possible
some examples or documentation links.

Thxs in advance.