Great fit for the Penny boards (I've the 22 inch) on it, with 2 clickable straps.
I've tested it in the rain, and it's water-proof.
The bottle holder might be a little too high, but at least the bottle does not fall off during skating.
Inside, the backpack can indeed fit everything you'll need for a day's out and about. A laptop, clothing, some books, etc. It fits.
What's interesting is the top space just under the straps, not much space but enough for some papers (just don't make it too bulky, the board might not fit otherwise).
The quality feels and is nice.
All in all, a backpack for Everywhere.