The Nr. 16 Rhodia Dot Pad is a lovely, fountain pen friendly writing pad for every day use. Personally, I find the dot grid very handy as it helps to keep my writing neat and organized without being too obtrusive, and it is easy to use in either horizontal or vertical format.
One technical note: while the Nr. 16 pad has the gross size of A5, the detached pages are NOT A5. They are about 20mm shorter. This drawback will be apparent when/if one starts to file detached pages with other standard A5 sheets. Unfortunately, Rhodia(Clairefontaine) does not seem to make a pad that offers detached sheets that are standard A5 size (210mm X 148mm), like they do for the A4 format (see Nr. 18 vs. Nr. 19 sizes).