The Westcott Apollo is one of my favorite light modifiers. You’ve seen it featured a ton of times on DIYP. It’s one of the more bought items on the Gear Guide, and we like it so much that we even gave one away a while back.
Anyhow, the unique softbox-like light with the umbrella ease and strobe-friendliness makes it a great tool to have in your on location lighting box (or bass case).
There is only one small thing which is not perfect about the Apollos, they don’t tilt. Really. If you are shooting with an Apollo on a light stand, you are pretty much limited to having the box point forward or sideways. It is not trivial to have it look 45 degrees down.
Basically, the Apollo gives you two options: Great light, with the strobe very close to the back screen, and almost no tilt. OR, you move the strobe closer to the shaft base (the zipper on the bottom of the Apollo allows this) to tilt, but then you risk hot spots.