I have had my ROT-66 for about a week and have been testing it in the increasing dark hours here in Alaska where I live. Here are my thoughts about this light:
Unboxing: A nice gift-worthy box with a magnetic close. Classy.
Size and weight: Compact ¾ scale soda can format. About half the weight of my BLF Q8
Aesthetics: With the champagne color it is elegant. It looks like big jewelry; a welcome alternative to basic black.
Emitter/Color: Mine has 9 XPL HI V3 3A. Natural White: I like it. Excellent color rendition. It's like the noon-day sun is out.
Brightness: This is a ridiculously bright floodlight. It is the brightest light in my collection that includes Emisar D1, D1S and D4 lights as well as the BLF Q8. It is brighter than my car's headlights on high beam. How many lumens on Turbo? I don't know. But it is considerably brighter than the BLF Q8. (Both are powered by new button top Orbtronic ORB-3120 batteries – rewrapped Sony VCT6 - which each kick out 30+ amps for a few minutes.)
Throw distance? It is primarily a floodlight. Yet with this much brightness, useable light reaches out a couple hundred yards – only slightly less distance than the Q8.
User Interface: It is intuitive. I only use ramping or two-click Turbo. When ramping up there is a quick blink when it reaches maximum brightness.
Carrying ease: If I am wearing baggy jeans or an overcoat, it is pocketable (I find the Q8 is not). It also comes with a substantial lanyard which screws into a tripod hole. The lanyard's color is also champagne.
Heat management: It gets hot quickly on Turbo. Any longer than 60 seconds requires gloves. During winter in Alaska this heat can be useful. Heat is not an issue when the light is ramped down a bit.
Fun feature: A glow-in-the dark ring surrounding the LEDs is activated by the brightness of the light. It glows a very attractive blue. Nice touch.
Summary: This is a pretty light, a classy light. This is a ridiculously bright floodlight with some throw. This is a relatively compact and therefore useful light. I keep it close at hand in my Bentley's glove box.