Le Boreal is a very attractive ship with an elegant, sophisticated interior, comfortable public spaces, and smallish but comfortable cabins.
We had a Deluxe Suite which had an extra dressing space and a longer balcony, and we found that there was plenty of space to store our items for a seven-day Iceland cruise.
The mix of passengers is roughly half American (with some British) and half French. I enjoyed the mix as I am always looking for ways to improve my intermediate-level French and found a few French guests that were willing to tolerate my struggles at speaking their language. One could observe the standard American/French differences that may be uncomfortable for some Americans. French service tends to be formal and inflexible, and if you expect that at the outset you will be fine.