You guys are all crazy. I got a stereo penny deck a couple months ago and didn't use it for a while because i thought it was to small. But eventually my bro got one and we started riding them and now i love it. I ride mine everywhere, it's perfect for cruising to class because you can fit it in a bigger backpack. As far as hills, I have taken it down every hill in my area (UNH), which isn't saying to much but i have taken it down some pretty big hills at home and it wasn't' that sketchy at all. Also in my opinion it carves like a snowboard which is weird to get used to, but once you do its fucking sick.
Sparknotes: Get one, they are relatively inexpensive and well worth what you pay.