Faulty Removable Back Cover
The umbrella is great as a shoot-through. The problem is with the removable back cover which is held in place by little pins stuck in the ends of the little extension arms of the umbrella. About half popped off the first time I tried pulling the back cover off. So, I'll end up using the umbrella as a shoot-through.
In retrospect I wish I had bought 2 dedicated umbrellas--a shoot through and a reflective one.