I finally have everything I need to use my flash off-camera, and today I went and bought a 5-in-1 reflector/diffuser too. I decided to test out my little "home studio" and so I did. I held the diffuser in my left hand in front of the flash and I had the removable reflector skin (silver) hung on my right side. I gotta come up some piece of cardboard or something to put inside the reflector skin so I can use both the reflector and the diffuser at the same time more easily. The camera settings were the following: ISO100, f/11, 1/200s.
I can't wait to get someone else in front of the camera so I can play more with the flash. It was kind of tricky holding the diffuser in one hand and the remote in the other and try to have my shoulders in a relatively natural position.