We did 2 weeks on the Summit. We were on the Summit 2 years ago on the same back to back. The entertainment was either a repeat or below average. The ship definitely did not have a 'fun' feel. They pretty much close up the pool area at 8pm. We ate in the buffet most of the time because the food was so so in the dining room. We liked the salad bar, stir fry and back grill where they freshly cooked steaks, chicken, pork and fish in the Oceanview buffet area. The dining room waiters and room stewards were average at best.
My husband and I are both self-employed so we wanted to keep up on work related email, etc. The only option now is 1 hour continuous, 24 hours continuous (that's if you don't sleep) or the whole week unlimited, BUT only ONE device for $250! You can get an additional device for 50% off those rates. WHAT A RIPOFF! We never bought any of it. We just waiting until we got to the islands to get free internet even if we had to buy a few drinks.
Celebrity is good at getting you on board without lines and the cold water and towels are awesome!