Just back from a 2 Ride to Cornwall and have added some of the K2 Footage i picked up over the Weekend to a Video on You tube and thought it may work as a handy comparison between the K2 and the other cameras i used. In this case a Drift HD Ghost (Helmet) GoPro Hero 7 Black (Rear facing GPS mounted) and the Front and Rear K2. All sound is from the Drift which has a Mic inside my helmet as the K2 is pretty Garbled most of the time and the GoPro is just wind noise without a proper mic.
One issue i have and which is not a fault of the K2 is simply how quickly it gets dirty in wet road conditions. Maybe a different location would help but i think it's just one of those things for this time of year. Link below is me travelling from the East Midlands (UK) to Glastonbury in Somerset. Majority of the footage is GoPro/Drift as it was so wet startign of that the K" footage was pretty much unusable until it dried up a bit which is about midway through the Video (17mins) Another vid to follow which uses much more of the K2 footage and has some Low Light comparison as well. Will post link when it is uploaded.
If anybody else has done any comparisons it would be interesting to see.