It's nice, but it only works where it's mounted, and it does not seem to have hardwear for on-body mounting.
Agreed that audio + video is better than audio only, but digital voice recorders can stay with you when you leave the vehicle. And they are a lot less expensive.
When it can fit into my shirt pocket and the price is less I'll be very interested in something like that. Till then, it's just audio for me.