I haven't stayed in or visited this category on this class of ship. Yet, in Alaska, it's all about the destination, and the glaciers are best seen from an area that maximizes your view. We had a balcony on our last Alaska cruise and rarely used it. Instead, we went to the common areas, both inside and outside, where we were able to share the experience with others. Often, someone else would spot a glacier calving and shout it out -- I would have missed it had I been in my cabin.
If it were me, I'd save on the cabin and use the difference on shore excursions. JMHO.