I've had some quality issues with NiteRider through the past few years. I had a pair of Lumina 700s where the USB charging ports broke, and a larger Pro 1200 Race with connection issues to the separate battery. On the Luminas the USB connection to the actual light simply broke off after less than a year of use, and on the Pro you had to "wiggle" the connection between the light and the battery to get it to work or charge. It just seemed a little shoddy, I guess lol - I have since switched to CygoLite (a Trion 1300) and the quality seems substantially higher. Addidionally, the Trion has a more street-friendly beam pattern.

I had a couple of NiteRider MiNewt 600 Cordless lights in the past (which is the predecessor to the Luminas) where I didn't have any quality issues, so this may just be a recent downturn.