WoW!!!! I stopped by Kickady Scuba today and I was able to try out the Poseidon Discovery MKVI re-breather. Talk about an experiance. NO bubbles, NO noise, it was like breathing on land, seriously!!! With it being a closed loop you really need to be good with your bouyancy skills. You can’t use your breathing to control your up and down movement through the water. This is not one of those complicated "Tech Rigs" this is being marketed for use within the recreational dive limits. Now I was told you can upgrade the software and add the mixing block and you will then be able to mix and go " Deep Tech ".
All I can say is I had a blast. This is going to be the wave of the future in diving.