Hi Jon
I dived the Meg now for 1½ years, with a few modifications I found it to be the best rebreather for me, and I can recommend it 100% You will not find a more robust and no nonsense unit on the marked.
If you have time, also take time to read the following post:
http://www.rebreatherworld.com/megal...test-data.html
Hope you make the right choice
/Christian