I think some of the negative comments come from people who fail to plan ahead. The Allure holds 6000 pax, so some things do get crowded. The parades on the promenade can be fairly congested. If you don't like crowds, just avoid that area of the ship for that hours.
I found many of the other shows less crowded. The ice show and the comedy show I went to had many open seats.
I had an inside cabin, and I had plenty of space. The bathrooms are the same as most of the rest of the fleet. I found the crew to be first rate.
I find the drinks to be fairly strong. My solution to this...have beer, wine or Smirnoff Ice...always the same. No bartender medling.
You will be amazed and you'll have the time of your life.