You will feel the bobbing motion. I suggest calling your travel agent to see if they can get you a little more midship. Deck 7 is the deck with suites on it, so see if they can get you a midship on deck 6 or 8. Heck see if they will bump you up to a suite!
Some say that the lower the deck the less motion you feel. I had a low deck cabin on my first cruise and a cabin two or three decks up would have been better. I've had a Deck 8 and 10 and I really felt no motion, now I did feel the motion (which puts me to sleep) on Deck 3 in the main show lounge!!!!
2007 Victory & Triumph
2008 Conquest & Liberty
2009 Valor, Freedom, and Splendor
2010 Glory and Liberty
I gotta go where it's warm.....
Over 40 victim of fate.....