KM BBs are hard to drive at first especially the h44, and km shells are not that great in damage but if you play km correctly your hardly to reach with km range...

  YES... go get a km bb :)

Only if you want the challenge.. I have a KM BB crew because I was stupid when I started.

I like km bbs from 1 to 4, they are hard to play in GB, and they are really not suited for nightbattles, but on select mode they can be very effective.

H44 atm is really hard to play. L2 for example have just 1.5 dot less range, but much more resistance, smaller hitbox, 1 more support slot, much more dmg, even with only the 2 front turrets can hit harder, and a 2 turrets L2 can be AW (owning noobs in gb) or just outspeed you...

and in the h44 is really hard to get the speedcap, im running 4 engineers lvl 108,107,106,102 with 150,140,150,170 vet, max esperts, all bosted and i'm still stuck to 38knot....... to use one national advantage that is AA you have to sarifice 2 support sailors.

Anyway H44 has a problem with damage but on test server are tryng to fix it.

About KM BBs.....

As McTass said H44 is a really hard ship to play. It have..maybe zero charateristics to use it against ohters tier 5 BBs, and also if a prefered target for high level DB´s.
There are also other points about KM ships that I like to expose here.

EXPERIENCE
I didn´t have an answer for one question.
During last event I use PBB Km and RN, and note that with almost same damage deal with both ships (about 90K) the exp recieved is too different.
With KM PBB -> about 55-65 K
With RN PBB -> about 105-120 K

Why dealing the same damage AD have too less reward in expereince comprared to RN, in this case?

Taking Damage:
Compared to other nations BB, KM and IJN are the most weak in this point. In particular case KM BB´s seems like they atract DB´s as flies

About BO:

Most player know that any sailor can be used as Bo in certain ships, like  PCA, PBB and event ships. 
In AD PBB ships I found that if and ENG is used the aiming lines are the same or even larger that any BO, or any other sailor que high potential (planesman, Sonar).

 
 

forgot about a pair of things...

Experience at high levels are based mostly on your personal attack. as km your role is to push the enemy, but this is often going to give you low exp.

while you push there will be probably a teammate rushing with a bb faster than your (h44 is one of the slowest bbs in the game...), this hardhitter will probably steal your food get most of the attack and so experience. you'll get low exp.

if instead your team is failing your low dmg guns, low speed low resistance don't gives you much chances against lots of bbs... and then low exp for you again.

Credits, the h44 is the most expensive bb5 to repair, iirc 9,5k vs a 6,5 k of L2... in many games you ill not receive enough credits even to repair the h44, resulting in a loss :O

3k isn't a lot for 1 game or rich player.... but think about those who take this as first line. 1000 battles where you gain 3k less than an uk it's a 3M loss

After reading these comment i guess it would be best to push my KM back untill i have some other well working crews. I might take the CV or SS not sure yet. But after reading this i think that KM BB is just not woth it for me at this point.

Thanks to you all for your insight and help.

@mezak

km AD is not that bad, i always got 90k-140k attack when i still used it before

it got nice turn rate which make AD easier to dodge incoming shells

fast reload enemy shoot once but you already shot them twice

semi block guns

small hitbox

it got nice speed i used to have 40 knts but my sailor gone fat now its 39 rofl