I absolutely love how spiky it is and the weight makes it feel spiky even when its just resting on your palm, ive bought the 3d printed ‘little ouchie’ spiky hand rollers before and compared to this they are garbage and as someone whos autistic when i have a panic attack or meltdown i need to pain stim and this is perfect! I think for people 13 and up this is an amazing purchase, yes its expensive but its worth every cent