Taxi cam that records high quality footage at day and at night, both inside and outside the vehicle. Resolution: 1080p front, 720p rear. Supports Wi-Fi, GPS, G-sensor. Free apps for iOS and Android. Sturdy build quality, great design.
Transcend DrivePro 200 (TS16GDP200)
High quality video day and night, Wi-Fi support and a large angle of view (160°). Easy to set up and use, even for the technically challenged. Solid build quality. Exellent user feedback and helpful, responsive after sales support. Downsides: Medium size and not too discreet. No GPS.