Story time. When I was in fifth grade, I had to take a certain medication at a certain time every day, and I would go to the nurse's office to take it. She had her son's childhood binder of Pokémon cards in the office, and as I had been collecting for a couple of years, she would let me page through the binder, a red Pikachu one like the one from the article, filled with cards from Base Set through Neo Genesis. That experience cemented the first generation of Pokémon as one of my favorite eras of the game to collect, and while I have collected most of the commons and uncommons from the first three sets, I dream of collecting more of the Classic Stars Holofoils I admired as a child and a new collector (right now I just own Lapras, Vaporeon and Muk).
Interestingly enough, I have been looking at the possibility of buying a four pocket binder, as I find the nine pocket binders somewhat unwieldy, since I have to take cards out if I want to hold them closer to my eyes and scrutinize the fine detail. They're also harder to hold when lying down on a couch, and harder to hold up to the light if I want to enjoy the holofoil. I've used nine pocket binders my entire life and enjoy how they are laid out, but as the larger, heavier binders make it harder to fully appreciate the cards, this product is right up my alley.
I also appreciate the snap clip. While I can imagine it being a problem if I'm storing multiple of these binders on a shelf, the advantage of a snap clip over a band is that it won't get snagged on other binders if I leave it loose, nor will it bend the cards if kept on all the time. It's fun to see UltraPro merging this older fastening method with the newer quality of card pockets, ones that can accommodate sleeves for additional protection (unlike the originals).
Of course, all that remains to be seen is the price, which will play an important role in deciding whether I buy one or two of these. For the record, I do currently have somewhere in the neighborhood of 160 cards not in binders, so I will be able to move some of my classic (or rarer) cards to one of these binders to make room for the undisplayed ones.