[Serusers] NAT considerations...

Just some thoughts based on my experience... After months trying to make everything work using rtpproxy-mediaproxy with almost everything accomplished but video, I tried to switch to stun solution. All my problems are gone now, I have audio, video, presence and instant messages working like a charm. And most important media server doesn't flow thru my server so network load remains very low. I have been testing for some days now and I'm quite happy since I still have to stumble on major problems. Now some considerations... On a poll onsip.org STUN usage is very low and rtpproxy-mediaproxy rule as NAT trasversal solution. Why don't people use stun? Has it some major drawbacks I still haven't found? What are main advantages of rtpproxy-mediaproxy solutions? I'm really curious to know serusers opinions about this issue. thank you all for your two cents ;) -- Giovanni Balasso giaso(a)yahoo.it