im hoping to get one soon
ive used other hookahs and have a snuba set up
they last longer but are heavier and more difficult to get to the water
you can buy extra batteries for the nemo and go right back in
you will find a story here
titled i think - Snorkel Snuba...Hookah Scuba
written before Nemo was invented but will shed some insight
on pros and cons of "going under"