At $15 a binder, that's pretty decent, and they look good, too. I like that the ring mechanism is on the inside of the cover as in my experience that seems to hold the pages better, or maybe it's just that they look better that way. Slipcases which I'd want, also cost $15 so it's $30 for the set. Still not too bad especially compared to something like the Scott 3-ring binder and slipcase which runs around twice that much, though that binder is a larger size for Scott's larger sized pages, of course.
The only other 3-ring binder I've seen for 8.5 x 11" pages that I really like is the Lighthouse F binder which comes standard with a slipcase. It has a very attractive padded cover, and it sells for "around" $30 (I think that's right) for the set -- a price equivalent to this Palo binder and slipcase. It's rings are mounted to the inner spine, though, not the inner back cover. It's also available in three or four colors, depending on your taste -- maybe different countries in different colored binders? If I were using 3-ring binder albums for this size page (using Steiner pages, for example), this LH binder is the one I'd probably use. If you don't know it, it's commonly available from various sellers on
ebay and
Amazon.
Both of these binders, the Palo and the Lighthouse F (with or without slipcases) are far better looking than office supply store binders that some collectors use. I'd also imagine those cheaper binders may end up not lasting very long and have to be replaced. Might as well buy a good binder with a slipcase to begin with, one that will last for decades and not just years.