I have switched from the Cygolite Metro 550 back to my cheap Chinese Magicshine clone (3rd year in service for that light). It's still got by far the best beam out of any light I've owned. It's a spotty smooth reflector light with the Action LED Lights diffuser on the front.

The Cygolite is OK but if I run it on high (required on the bad roads I am riding in the winter), I have to charge it every day and it takes hours and hours on a USB charger to charge. And its beam is still not as bright or as well shaped as the eBay clone.

Batteries can be a problem, but even the cheapest junk batteries that came with a $30 clone light have lasted well for me, with decent runtimes. In fact the only pack that's ever completely failed me, just last week, was the GeoManGear pack that I've been using since whenever it was that he had those made, probably 3 or 4 years ago? He famously had them made with quality cells, I guess Panasonics or something. Anyway it died, I can charge it but it dies after only 30 minutes instead of 3 hours. I need to put all of my packs on the Tenergy charger on a full charge/discharge/charge cycle and see what their actual capacity is (this takes a day per pack) and probably weed out the weak packs.