I have one of this bought from HK. The only difference is the head has 3 LED instead of 1. The canister, it seems long, but it is actually just a little longer than Light Monkey 9A canister. It looks long because it is very skinny.
I use this light in Thailand Live Aboard. Overall, I like it a lot. Being able to reduce brightness in tropical water night dive is definitely a plus. Charging 3 26650 can be tough. A 4 26650 charger will be very big. My charger can only fit 2 26650 at once. So I have to charge them in 2 pass. So in my vacation, I will charge them at night, and use them for the first 4 dives in day time. The battery will last more that than. In the last dive of the day (night), I will put in C cell while the 26650s are being charge. I only need about 25% for night dive, so Cs last me a long time.
The down side: 1) Yes, the cord and gland looks cheap. I will pay attention to them as I use it. So far, I haven't had issue. 2)The mounting location is too low on the canister even if I move it to the highest point. This make the switch very high on my side. In water water, I have no issue operating the switch. But in cold (home) water, I can't reach the bottom consistently. If they can make a p-switch on the head like UWLD, it will be a very good light.
I am trying to modify this light to work with my LM 9A canister. I am thinking I will go with E/O cord. But I will lose the ability to change brightness. I am still looking for best method.
I also had Morph and just sold it. My 3LED version is a lot brighter than the Morph at. I would say 25% on my 3LED head is about the same as Morph at 100%. Morph's canister is also too short to tugging in long hose under.
My recommendation is this. If you are going into GUE training, just keep saving for now and get a "try and true" canister light as your main light. GUE classes are expansive. If you go down that road, the cost of a canister light is a smaller portion of the over cost. And their classes are also very demending, the last thing you want is to have to fiddle with your gear in the class. It is just not worth it. This can light and Morph, they make a good backup can light or a good travel can light.