Definitely looks like direct competition against Zebralight SC600.
The look of that side switch worries me, because it sits up high like the old Zebralight switch that was a flawed design. I hope ET has done something to overcome that defect that Zebralight had, or they are going to go thru the same bad time.
On the other hand, the UI is VASTLY superior to Zebralight, so that is a BIG plus in its favor.
The ability to select the brightness on the head BEFORE turning the light on is a huge advancement over the Zebralight UI.
The extra hundred lumens over the Zebralight is fine to have, but that doesn't make a huge difference to me. But I REALLY like the fact that they have a regular beam type which should throw well(14k lux!), AND an optional diffuser filter which can quickly give you a flood beam, and they have other filters included in the optional kit too. I love the filter kit which screws on to the head in place of the normal bezel, just like a camera! Very cool! And the filter kit includes extra longer bodies for more batteries if you need long run time.
It does have the typical 3+ minute step-down, which doesn't thrill me, but it has come to be expected now. But, after going back and reading the programming features, it allows you to reduce the step-down amount to 10% instead of the default 25% step-down, which gives more flexibility than the Zebralight in that function too.
But, at 7 or 8 lumen low mode, it lacks the moonlight mode that many of the Zebralight fans swoon over. And the ET is more than a half-inch longer than the SC600, so the SC600 is a bit more compact.
All in all, I'd say this light has what it takes to take a good portion of the market away from Zebralight, UNLESS they have inherited the Zebralight curse with that side switch giving unwanted activation in the pocket. That's the only worry about this light.
Nearly everything else beats the SC600 flat out. This ET is a MUCH more refined and capable design, albeit slightly longer and no moonlight mode.
IF the switch is reliable, I'd buy this over the Zebralight SC600, if I were buying in that category.
But the switch IS a question mark that I'd need answered satisfactorily before buying.