This was our first cruise on Celebrity; we both have cruised before. We had adjoining staterooms on the Summit on Deck 9 in Concierge Class. My wife and I occupied one stateroom, and our 16 year-old daughter and her friend were in the other. After reading the reviews here, I was a little concerned that there wouldn't be much for the teenagers to do onboard; more on that later.
We drove in from Pennsylvania. Embarkation at Cape Liberty was a breeze - we were checked in and on the ship in about half an hour. Our staterooms weren't ready till 1:30, so we enjoyed a buffet lunch at the Waterfall Cafe. Once we got to our staterooms, it took about 5 hours to get all of our suitcases delivered to us. It does not appear that there is any benefit to being in Concierge Class as far as that goes.
The staterooms were clean enough, although the balcony was dirty - cigarette butts left there by some previous guest were never cleaned up all week. There were never enough towels and never enough ice, in spite of daily requests for the same. (You would think they would remember after a day or two.) Our stateroom attendant "Joaquim" was nowhere to be seen all week. We would call for ice or towels, and most of the time they were never delivered. We did not leave a tip for him.
Nice sized closets, good location, very quiet. Clean bathroom and comfortable beds.