Well let's get right to the bad:
Yes, that little micro-USB connection should be inside the unit under the open door. I bought the Lumina 650 sometime last year and within a few months the little connection broke loose when I tried to plug it in to charge it. I chalked this up to bad luck, and maybe riding over some bumpy roads had loosened the connection. I exchanged it, thinking this was just a freak circumstance and wouldn't happen again. But no, just this week it broke loose again, so I'm guessing bad design. The connection is tight, difficult to connect just right, and not strong enough. The handlebar mounting connection isn't solid, and the light rattles in it a little bit. The battery seemed to last only 2 1/2 to 3 hours on low before it switched automatically to walk mode.
A huge improvement over the Planet Bike Blaze lights that I had been using. I started out with the 1/2-watt Blaze, and then got the 2-watt. I usually had the Lumina set on low (200 Lumens) or medium, and I could actually see the road in front of me! Now I can't believe I commuted after dark with the Blaze. When I bought the Lumina I felt like I was splurging, but after using it the first time I realized it was one of the best bike-related buying decisions.
This week I've used a Blaze or a Princeton-Tec Eos (70 Lumens) I had lying around. The Eos is brighter than the Blaze, but still doesn't light up the road. Didn't like riding with either one, and felt a bit unsafe.
The good doesn't outweigh the bad in this case. Maybe the 2014 Luminas are built better, but I'm leaning towards the Cygolite ExpiliOn 800 or 680 now. Worried they might have the same connection problem...