There dont seem to be too many pics of these new 300Ts out in the wild so I figured I'd share my thoughts, although being my 1st Doxa Sub, I cant compare it to older models, short of my brief experience with a friends 1200T.
As I understand it, this is essentially the 1200T but sans helium escape valve and with an improved bracelet, no bad thing in my book, as having handled a friends 1200T Caribbean model, I can say it was superb, and this matches it in every regard (including the 1200m water resistance).
First off the case finishing is superb, there isnt a brush line out place, or a sharp edge anywhere, it easily matches other (more expensive) divers I've owned. The crown has an inlaid and painted Jenny fish logo, which isn't that noticable in person vs in photos, but if you hate it, I guess some cape cod could polish it off. The bezel is rock solid, no play, and unlike my CWC diver that this replaced, it doesn't click against the case if you tap on the bezel.
The crystal is totally flat unlike the 1200T which had a slight dome, it seems to have quite a good AR coating, although having a bright dial in the background is even better for minimising reflections.
The dial itself is glossy, looks almost like enamel, same goes for the hands and black indices. I'm a little underwhelmed by the lume though, it does stay visible for an entire night, but the dial markers just dont match the hands for sheer brightness leaving it looking like a vintage watch that's had its hands replaced, the faux-patina superluminova on my CWC 1983 reissue diver completely obliterates the Doxa for brightness and consistency across the dial/handset, which is a shame given that the Doxa cost twice as much. Oh and before I forget, the orange pip on the bezel does glow, but not enough to warrant mentioning, they might as well have just used paint.
The bracelet is tapered and has a different clasp design to the 1200T, +the ratcheted diving extension is pure genius. The bracelet itself is very comfortable and has no rattle whatsoever.
As for the movement, well sadly it's not COSC cert like the 50th anniversary Sub 300, but it is a decent enough 2824-2 and having worn it for 2 days, it's only gained +4 seconds, so its not a million miles away from COSC spec.
Packaging is pretty standard stuff, card box, with zipped nylon case inside... I really wanted the old tube case though, they looked great!
Not much else to say really, for my 2 cents, it's a fantastic dive watch, not perfect by any means, but every bit as good as the 1200T it has replaced, and not being a limited edition, should actually be available to purchase new.