Since I'm running the Rise of the Runelords Adventure Path, I figured I should go all in and pick up the official Rise of the Runelords Dice Set. I've now used these dice for about a dozen sessions, and on the whole I'm happy with them. The set comes with the usual assortment: 1d20, 1d12, 2d10s, 1d8, 1d6, and 1d4. The corners of each die contain small sihedron runes (the 7-pointed star that has significance in the Adventure Path) and the borders contain the ancient Thassilonian runes representing the deadly sins of pride, gluttony, sloth, wrath, lust, envy, and greed. For each die, the highest number on the die is the rune for one of those sins. It's a cool set in that way and cleverly incorporates memorably symbols from the Adventure Path onto the dice themselves. I'll never run this Adventure Path again, so having custom dice for it as the GM is a nice souvenir.
My only complaint is that a couple of the runes just happen to look like "1s", and thus it would be easy for the roller to confuse rolling a 1 on that die with rolling the highest number on that die. This is an issue with the d8 and one of the d10s. It's not a big enough deal that I would recommend against buying the set, but it's worth paying attention to lest poor rolls be attributed to bad luck rather than a misinterpretation of what those dice show!