Dave, I think you might be mixed up...
From the OP's signature it appears they are traveling aboard the Fascination and yes I think you're right about boarding on the Empress deck but it is deck 4 on Fascination. Deck 7 would be the Lido deck, unless they've turned the pool into the purser's desk and the bar into the shore excursion deck
As far as cabin M127 goes it looks good, a nice oceanview cabin mid-ship and between two banks of elevators. I'd say you did pretty well! Bon voyage