| I originally bought an Apeks Quantum when I first started with my TDI Advanced Nitrox course. I had to send my first one back to Apeks because the buttons stopped working and they replaced it (no quibble, good customer service). The replacement seemed fine, but I've had three startling occurances where the depth gauge has gone banzai and started alternating between random depths...with associated annoying ascent alarms. I am sure that I was not inadvertantly bobbing between 14m and 6m....so I guess that the Apeks Quantum reliability issue has raised its ugly head again.
A few months ago, I bit the bullet and purchased a Suunto D9....this has proven to be great. It's fabulous as a day-to-day instructors watch, has a good algorthym and allows 3 gas switches (compared to the Quantum's 2)...which means I can dive and teach the DSAT tec deep courses using air, o2 and an intermediate nitrox deco mix (which is the logical next step after the basic advanced nitrox course). The Vytec also offers 3 gas mixes, but I've heard a few people slag it off because the depth gauge has proven reliable on deep dives.  |