Apollo AV-1

Advantages: Range, Speed, Fun
Disadvantages: No safety cut out, heavy on land

I rode the Apollo AV1 this weekend when I hired one from a local dive school here in Lanzarote. I use the word "rode" deliberately because it was fitted with the optional "saddle." What a fantastic experience! You actually sit down on the scooter, so that it is between your legs. There is then a pull lever with six positions on it to control the speed. Leaving it on speed one is basically and idle with the prop just turning, but maximum is awesome, ...
..."fly", controlling turns, ascents and descents by adjusting your fins like an aircraft - it's even possible to loop the loop! Battery life is excellent at 80 minutes on a full charge, and the maximum depth rating is 50 meters. The unit is heavy to haul around on land, but is just right in the water, being slightly negatively bouyany, so you can leave it on the sea bed and go to explore something like a cave safely. Some words of caution here though ... Read review