They are nice for hotel and flight bookings to try out different dates, visualize the length of the stay and quickly see what day if the week you are picking.

They are nice for hotel and flight bookings to try out different dates, visualize the length of the stay and quickly see what day if the week you are picking. I think they would be good where additional info can be inlined such as existing events. But without those advantages I prefer to type it. Especially date of birth!! A year older is another 10px to scroll!