These are the first-5-minutes impressions that may change over time.
Looks smaller than expected. Marginally bigger than Aimpoint Micro but the extra 0.5cm is well appreciated in the objective. In fact it hits just the right size, not too small and not too large. The larger objective gathers more light. The picture quality will be better and brighter according to the laws of physics.
The overall quality seems nice. The brightness settings have that positive click to it, lots more than T1 series. The lowest setting is good and very sharp, #2 seems like a very fine dot for extended ranges and brighter settings to be used in sunlight.
It has that quality mini-ACOG feel to it and if it deliveres performance wise, it's an AIMpoint killer as it has more features for lower price and made domestically.
There is no reason to get a 20mm objective optic IMO when you have this.
Last note, don't get it if you have astigmatism, my first look resulted in OMG! It's not a dot but a mini-galaxy and I think it was rotating (joke). Looked at it with another eye and wow, what a nice, almost round dot. Took a picture of it and sure enough, nothing wrong with the dot. I got it for a 12 gauge so I don't need Uber-precision. I do not recall the T1 dot being that out of shape. The answer is my astigmatism got worse over the years.
FWIW, it didn't come with the mount screws, just the box and the paper manuals so I hope the mount I get comes with them. What is the size of the screws?
I will have to contact Trijicon if the ADM low mount does not come with the screws either.
The microfiber cleaning cloth is a nice touch. I don't recommend cleaning the optic all that often as it often leaves micro-scratches but it can be useful for eyeglasses and stuff.