I got my 60" softliter today. Very easy to set up. I also purchased a morris umbrella tilt head that was an accessory item listed on BH photo that should allow two flashes to be used. Unfortunately, the flashes can't be moved close enough so that was a bust. I am going to try and make something today and if not, will purchase a flash bracket I saw on strobist that works well.
Despite that I hooked up my one 550ex and fired it at 1/4 power and for indoor shots (which is what I bought it for), it looks like it may be powerful enough. I took a photo of the unbrella when the flash fired and the light fills the umbrella nicely. Of course, the real test will be when I try it out today with my wife.

