Recommendations for dash/helmet cam

[malumbu]

I'd be grateful if this thread was not hijacked.  This is separate to any beef about cyclists, motorists, LTNs etc etc

I've resisted buying either of these products, and feel a little uncomfortable about surveillance society.  The number of cash for crash scams has had me thinking, and I've just had a number of incidents when out cycling in recent days- dangerous overtaking, person driving on a mobile, two times today cars speeding down a bus lane on Lordship Lane.  These type of incident often come in clusters, and I'll have weeks which are relatively quiet.  However the road rage this morning, when  a group of us where threatened by a psychopath in a van, was maybe a watershed moment.   The central London road, part of the London bike network, was narrow, with no room to overtake.  After squeezing past a few of us he told us in no uncertain terms that we had to get our of his way, twice getting out of his van in a matter tens of seconds, to intimidate us.  Not witnessed this deranged (drugged up?) behaviour for many years.

So any recommendations for, any experience of, dash and/or helmet cams?  

By all means discuss the pros and cons of having them.  But not cars vs bikes, thanks.

[Hen123]

I have a few friends who have GoPros and recommend. Not the cheapest option though.