Overall the MN sub is good.  The SS4 is very good.  Haven't seen too many SS5s, and never seen anyone use the deck gun on it.   As for the SS1 or SS2, they (like all other nations) are completely obsolete and useless.  But you have to learn somewhere.

MN SS  all are not good.

SS1- small rubbish
SS2- just rubbish as SS1
SS3- big and rubbish   a little bit faster than other rubbish

SS4- Killling Machine for ships not SS 
Speed is really nice and small and cute 
Some users misunderstand it's ss1

SS5- My lovly SS
Even though it has Worst SS war but not bad.   Because its just fuuny  troller
I always use Deck gun  it can damage around 800~1600 x2 

Thanks timmerman, for me i just want to know if mn ss have the edge to the other ss nations. Well to tell you the truth it does not matter what nation of the ss, it all depend to the person who drives or controls it. But thanks for your comment. ^_^

If you want to be an SS fighter go Km. they have the speed, turn and proxi advantage.