Hi again, whilst many will say that once you have had a balcony you would not want anything else we are in the small group who were happy to return to an inside stateroom rather than a balcony (okay it means we can cruise twice as much
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The inside staterooms on that class of ship, along with the aircon and good use of mirrors and colours, mean that we do not feel at all closed in, so you needn't worry frm that aspect.
As for the cruise itself, well most of the time you are away from land, so you could be anywhere, also as the ship makes the full journey in and out of the Baltics, a balcony along the sides will spend half of the cruise in the shadow of the ship, which combined with we always seemed to be on the wrong side of any wildlife action was a drawback.
When sailing into ports, we tended to head to the cut away walkaround at the front of the ship, which was covered, so no problems with rain & well sheltered against the wind. From here you get the full view of the land ahead rather than a view of whatever you happen to be passing at any given time.
Having said all that, it really does come down to personal preference between the privacy of a blacony as opposed to the cost saving of an inside cabin with plenty of opportunities to watch from the deck or promenade.
Hopefully this has given you some food for thought.
Alan & Katrina