They appear to all be the same size. There is a special mark in the upper left to make partially sighted people or perhaps color blind people to distinguish them more easily. They do not seem to be plastic, like the $20 peso note, which will not be reissued.
They are prettier than Euros or dollars (if you ignore the value of course). It is nice to see someone other than politicians on money (as in the case of the Mirabal sisters and Henriquez Ure?a and wife). I would like to imagine Mark Twain on the $2 bill, perhaps Hemingway on the Hundred and Frost on the Fifty.
Duarte is ideal, since he said and did heroic things, but never was allowed to run the country, and all his enemies were far less idealistic than he was. Rather like Marti in that respect.
Costa Rica had the prettiest examples long ago, when ten colones was worth something worthy of a bill.
For the blind, the design of the Euro is hard to beat: each one has a different size.
The lack of imagination prize has to go to the PRC, with Mao, Mao and more Mao on all the money.