I've got a TomTom Bandit. My mount is on the handlebars though but you can put it on your helmet. The thing I like about it, is, you can buy spare batteries. Qmeaning no worries about recharges on lengthy trips. Also you can control it through your phone via an app, which also allows for basic movie making and viewing your footage. There is also a button to mark highlights whilst filming.
Works for me but I really don't vlog or record voice input. The downside is an adapter lead is required to connect a mic. That lead is circa £20, then you need to buy a mic.