Hi Danvel...
You have a very well situated cabin... the more mid-ship you are, the better... you will not feel the ship move as much as if you were further in front or in the back of the ship... Of course, people can say that the more you're higher in decks, the more you feel the ship move, but I never noticed it... The last cruise I took, I had a cabin in cat 5a on the Fascination, it's in front of the ship, and man, did it move !!! And when I was near the pool, I felt the ship rock just a bit... nothing to go crazy about !
The only thing I would worry about your cabin is the noise... you're very close to the stairs and elevators, so it could be a bit noisy.. just a bit... But since you'll be in your cabin to shower, change and sleep, I'm sure you'll enjoy it anyways...
So enjoy your cruise... and have a terrific time !