Quality robot, excellent customer service.
I was impressed with the quality of the materials, packaging and instructions of the PiDog V2 kit, and enjoyed (even the sometimes tedious) building my dog. Instructions were pretty clear as long as you pay attention to the details, with the one exception for me was the positioning of the ribbon cable between the camera module and the raspberry (blue strip toward the black retainer). I apparently had a faulty camera module, and emailed Sunfounder customer service several times. Each time I had a response within 24 hours, and once we determined it was the camera they shipped me a new one with slightly different instructions on installation of the "modules". This fixed the problem, and I can now control my dog with the phone app. Pretty cool.