Sounds like one of Chuck Gardner's DIY flash reflectors would do a very similar job for far less money, and be a lot easier to carry in the laptop pocket of a photo backpack.
Yes I looked, but I've been using hot shoe flash directly, bounced, and with a variety of DIY modifiers long enough to have learned how to do everything those things can do better for far less money.
If that "Amazing Ginzo Modifier Set" was selling for the low-low price of $19.95 (plus shipping and handling) then I'd say "Hey go for it. It's a small price to pay for learning what works and what doesn't." But for $150? I'm more inclined to quote T. Tusser... "A foole and his money be soone at debate: which after with sorow repents him too late."
But as an anonymous Internet sage once said, "Your Mileage May Vary". So if you think its a great deal buy a set, test it, and let us know how it works.
