Help ! has anyone stayed in cabin M122 Regal Princess ?

We're going on Regal Princess April 2, to Hamburg. I booked via Alaska Airlines website as they offered some good perks and it was handled by their preferred cruise provider "Cruises Only" I was given M122 and I asked (twice) if this was an obstructed view and was told (twice) "No" - after hanging up I looked it up and found it was in fact an obstructed cabin. I spoke with Princess and all they could tell me was they thought it might be some kind of beam. The balcony is glass so i know it's not that. Anyway, thought I would ask if anyone here has stayed in M122 or has any ideas etc ? - I plan to change cabins if it's a big obstruction. We're new to cruising (only taken once before) and it's important to us, don't want it ruined by a rookie mistake I may make. Thanks for any help !!