I picked up geoboards 61, 66 & 72 along with the new Pocket charts from MMP. The boards are quite nice and as soon as they arrived I set up a SASL game and began to play. I love a country board (no villages, no extreme terrain, maybe a lot of grain or some gullies, etc.) so should have bought these awhile ago. 61 has a little stream running across the short dimension which it doesn't seem we get too much of, the few stream boards are more like 66 where it runs the full board length. Seems a little odd as my impression is gullies are as likely to run in one direction as the other.
My only issue with the pocket charts is the spiral binding makes it a bit difficult to follow rows to the end on 2 page charts. This means that, for instance, on the terrain chart if I'm looking for something like kindling # I often have to take a quick look at the notes column for a clue confirming I'm still on the proper row. ("No, an orchard wouldn't have THAT note...) I get that there are reasons they did this - the spiral binding improves the layflat of the product and putting the binding between single pages instead of going with a two page side by side format (to accommodate 2 page charts) saves table space. You have to compromise somewhere I guess.