Good service is expected. After all, you are paying enough for it. But quite a few ships are now all inclusive. But you won't find a dentist. Most cruise ships have laundry and dry-cleaning services, but there is an additional charge for this.
Many ships also have self-service launderettes.
Stabilisers on modern ships and effective preventative medications have, for the most part, eliminated the incidence of motion discomfort. SeaView's recommendation is that if you feel seasick, visit the ship doctor and ask for an anti-nausea jab. Alternatively, stay drunk.