I have played this a fair amount.
I purchased into the beta, and chose the CL Yubari. Light cruisers are fun, and this one has the exceptional IJN torpedoes.
But...the learning curve to use torpedoes is very high.
In hindsight, I should have chosen the Sims..the American destroyer. This is the most overpowered destroyer in the game, with an enormous number of guns, and a very high ROF.
The game itself is good, but predictable. The BB's and CA's stay at range and blast away at each other. Everything else tries to stay away from the big guns, and either shoots each other, or tries for a home run. A home run in this case is a torpedo run against a "heavy".
It is a good game..more contemplative and much slower than WoT, and I think more fun. I played about 8k matches in WoT, with a 57% win percentage..above 60% for my TD's, so I do have a good feel for both games.
This, like WoT, is essentially free to play, if you don't mind a slow, grindy avenue to increase your ships. As this is the way games are played, nice and slow, this works for me. It's a good game.