It is fit for purpose,, you press brake pedal when applying the brake so thus don't happen or you give it a big pull to make sure handbrake is applied but press brake pedal and its piss easy to pull handbrake 2 extra clicks

Ps: a few members of staff have ST's and they have not rolled down a hill by applying it correctly

I understand how pissed off I would be about it but unfortunately its drivers error just like when you open your door on a high curb ( done that the day I picked mine up lol)