During my testing of the HOG regulator, I did 32 dives with it in moderately cold water. Depth ranges were from 20 feet down to 100 feet. I did not take the regulator into a more aggressive environment (i.e. deep tech dive or wreck penetration). I’m very leery of taking new, untested gear on extreme dives. So I can’t speak intelligently on how they perform at deeper depths. Overall, the HOG D1 coldwater regulator performed similar to my Apeks. There were slight differences that I noticed about WoB and position of the first stage. Otherwise, the HOG and Apeks were similar. When comparing the HOG to my Scubapro, there is no comparison. The Scubapro had an easeir WoB and gas delivery. The Scubapro also beat the HOG in first stage placement as the Scubapro doesn’t stick out as far as the HOG and interfere with reaching a valve knob. The only down side to Scubapro is that they can free flow quite easily in very cold water. Which is why I use Apeks on my doubles and Scubapro on my deco bottles.
While the HOG regulator was fine, I can’t justify replacing my Apeks and Scubapro regulators. The primary reason is that I can work on my Apeks regulators. Since the HOG and Apeks are very similar, I can’t see spending a bunch of money on another regulator repair class for something that I already can do. HOG is the only company that allows their customers to learn how to rebuild the regulators, but it is limited to technical divers only. I haven’t looked at the course in great detail, so I don’t know the specifics.
When I look online, I’m seeing the HOG regulators being sold as a cheaper alternative to Apeks. I can’t justify the cost of replacing my Apeks with HOGs. Especially considering that my Apeks have performed flawlessly for me in the eight years I’ve owned them. There is nothing new or innovative about the HOG regulators. While the HOG regulators are cheaper than Apeks and Scubapro, if that is their only selling advantage, I’ll pass. If you are looking for a cheap regulator to use in shallow depths, the HOG is fine. But if you are looking for a regulator with great work of breathing, then I’d stick with Scubapro and Apeks.