This could be a long one, sorry.
I started out with one of
these a few years ago. It cost me 25 quid. It was great for what it cost, although the picture was grainy and under fast changes of direction, lens flare tended to turn things purple. Also, as time went by, the sound lost sync with the video, I could have probably sorted this, but decided to upgrade.
Roll on to recent months.
Transcend 200. I fitted one of these about 3/4 months ago for the father in law. It tucked nicely behind the mirror (Saab 93) and I rooted the standard cable to a second cig lighter socker (I installed) behind the dash. The mount is an adhesive pad (1 spare provided). Whilst this makes the mount smaller, it also makes it less portable. Up to 32Gb card.
Transcend 220. I bought one of these as my replacement. The sole reason for the 220 over the 200 was the support for 64Gb cards, as a full days motorsport can go over 32Gb. I was less bothered by the GPS. The mount is an adhesive pad (1 spare provided). Whilst this makes the mount smaller, it also makes it less portable. Up to 64Gb card.
Nextbase 402G. At the same time I bought mine, my mate bought this. So we've done side by side comparisons. 32Gb card, GPS. Suction cup mount, so a little bigger but more portable.
Oddballs notes/points....
The Transcend and the Nextbase both use the same type of mount from the fixing to the camera.
The Nextbase has a smaller lighter plug, the Transcend one gets caught in the Omega on gear change (need to hardwire).
The video quality between them (in my eyes) is too close to call. There are slight variations in angle of lens and F point (light needed), but not really enough to wow either way.
The footage I've seen/used was recorded on DP200 (Free 16Gb card that came with camera), DP220 (Sandisk Extreme 64Gb U3 card), Nextbase (Sandisk Extreme 32Gb U3 card).
Remember Youtube footage is encoded, therefore is not a true review of a camera.
One added bonus I found with the DP220 was that whilst both that and the 402G had GPS, the DP220 recorded your speed and GPS into a separate text file (On the SD card) which could be joined together and then overlaid onto Google maps. The 402G didn't do this. Whilst it's a nice toy to replay a journey, I'm not quite sure of the real world uses.