I guess just to make this easier I will give a simple pro and con list with some of my thoughts at the end.
VERY VERY detailed interior, a bunch of small moving parts makes the tanks really feel alive when you are operating it.
Very nice bullet physics and overall gun mechanics with the shells actually feeling like you are shooting for example a really big 8.8 in the tiger unlike a lot of games.
Crew models are quite nice even though the animations are still a bit funky and you cannot see them from outside of the tank unless they have opened their hatch.
Interior damage model for being in such an early state is pretty nice especially with the new update. Specific parts of visors can be broken, fire breaking out and then seeing the flurry of the fire extinguishers.
The map that comes with it is very nice especially when going into Phrokorovka everything looks amazing and realistic.
And some more smaller details I cannot really think of right now.
Exterior damage model is kinda meh, there are no entry/exit holes and the damage besides exterior fuel tanks are just simply an area of the tank that gets more and more roughed up the more it gets shot. (The parts that can fall of the tank like the fuel tanks still act pretty good and are pretty realistic.)
The controls are meh to horrendous depending on how much you like or are comfortable with using the mouse and keyboard. I do not have a huge problem with it except the aiming sometimes as I get stuck in the abyss because I'm looking the exact opposite direction my sight is looking and I get confused.
The enemy tank AI is not that great, it is very basic and does not behave very realistically like an actual tank crew would act.
Most ground units outside of the new tanks are of somewhat low quality for Tank Crew but that is to be expected
Simply put it if you are a huge tank fan this is probably one of the best ww2 sims right now graphics and ballistics wise. Since it is in a very early state there are plenty of things to be tweaked and added so I would expect most of my cons will be a thing of the past in the near future. I would say if you are getting it purely for the singleplayer I would maybe wait a bit as there is only quick missions you can do and some user created missions which are still quite nice. But if you also enjoy multiplayer it is a pretty good idea to grab it especially since people are usually playing in some servers. Overall I think it is a great little sim at the moment and I love it but it simply has gotten somewhat boring or just out of content a bit fast but that is what you are paying for in such an early access title. I would recommend it but just be aware there are still plenty of little tweaks that need to be fixed, but so far the quality of the tanks in the game so far especially with the new update is absolutely amazing. Hope this helped a bit, have a good day/night.