This is what one well known Youtube tech blog made of the BrainTap headset. It's an interesting third party perspective.
This gives you a lot more detail on how the headset works and what it looks like when it arrives with you.
It's impossible to recreate a BrainTap session without headphones and, preferably, the headset. But this short clip attempts to give you an idea what a BrainTap session feels and sounds like.