When I try to think of things that could have been better, it's difficult.
The staff was, to a person, wonderful. I was amazed that, with their absurd work schedules, & the pressure of dealing with so many new people every week or two, they could retain their genuine courtesy & friendliness.
The cabin (I think it was category D2) was comfortable. It was very important to have a balcony, which we used regularly. One needed to be an acrobat to use the shower.