Picture at: travel.webshots.com/photo/1502360061061635310sRDQQL
I'd book it and hope for an upgrade.
Celebrity Constellation (Penthouse booked for 2014)
Princess Grand Princess (2012) Vista Suite
Princess Crown Princess (2011) mini-suite
Princess Emerald Princess (2010) min-suite
Carnival Conquest (2008)
Princess Grand Princess (2003)
Carnival Victory (2002)
Celebrity Century (1997) Century Suite
Carnival Fantasy (1997)
Carnival Ecstasy (1994) Grand Suite
NCL Sunward (1992) Marquee Suite
RCI Nordic Empress (1990)
RCI Song of America (1988)
We sailed on the Summit in 2007 and we were in Cabin 6136. The balcony wasn't any bigger width wise, but it was deeper in length (maybe twice as deep). Part was covered by the balcony above, and part was uncovered. It was wide enough for 2 chairs and a table and long enough for a lounge chair or two. We'd reserve it again in a minute!