I'm sure someone has brought this up before, but couldn't find anything.

Anyway, thought I'd mention the reviews I found, if anyone was interested.

Many said the knee pads were extremely painful and slippery (but wearing kneepads helps).
The center pin always comes out, which can be fixed by stickytape.
The red paint flecks off into powder everytime. Bit of a health hazard really.
To actually target your core, you have to consciously tense your tummy, and also, it's a lot harder to use than it looks.
Some reported sore necks.

Most said it wasn't worth the money.

Anyway just thought I'd post this so it's there for anyone's reference!
I knew it was too good to be true.