I have v2, and the installation was pretty rough. The Skyline and Eclipse models look a lot easier.

I've ridden with them as my sole front light when my front light runs out of power. They're good at illuminating the ground right in front of you and being picked up by reflectlors at a good distance, but not anywhere near what's needed for you to be able to see. The light does project pretty far, and I've had multiple drivers stop and tell me how good they are for being seen.

The rear lights are very visible from behind normally, but sadly not so much on my bike because I ride with fenders. I don't think there's much to be done about that.