Didn't like it. Did all that grinding, got the top gun, thought the tank would be amazing with it... and then failed to clip an arty. Every shot hit, but the arty survived with about half its health. As I was revving the pitiful engine, trying to get this thing moving again so i could reload and re-position, a second arty nailed me and the battle was over. Kept the tank after I elited it because I thought I would go back later and improve the crew, but sold it recently because I deemed its garage slot more valuable than the tank. I already have two other tanks for low-tier autoloader fun, the Pz. 1c and the Cruiser IV, and they are both vastly superior tanks.
I did like the tier IV, it's halfway decent. But I sold it too after realizing I would never play it again now that I have the tier V (which I love). I sold the tier II long ago because it's a worse tier III with no autoloader, but I did keep the tier I Kolohousenka purely for the novelty of driving a weaponized ice cooler.