We travelled on a cruise for the first time so we did not know what to expect. I would like to give advise to people who are in the same situation. We booked the Baltic cruise through Tallin, Helsinki and St Petersburg.
I was nervous about the fact that I have never been on a cruise and I might get seasick. Luckily, we had great weather and the sea was calm. We were told that this is mostly the case on this route. You might feel the vibrations of the motor from time to time and on the bow (front) you feel the waves more than at the stern (rear).
We booked a cabin with a balcony which is totally worth the price difference to see the beautiful Stockholm archipelago in the morning when you sail out and sunbathe away from the crowded pools if you enjoy your peace and quiet.
Spacious cabin with plain facilities (Bring your own soap and shampoo) and a wonderful small private balcony with two chairs and a side table. Modest minibar with reasonable prices. Good quality bed. Plenty of storage, a varied selection of TV channels and efficient cleaning service.