I have purchased two sets of these flashpoint 620 monolights and they all have worked great for me I have had one set for about 1 year and the others about 2 years. I have softboxes 32x48 which is huge and 24x24 they gives off a nice soft light I do do believe that the flashpoint speed ring for model ll should fit any softbox because they are made for flashpoint monolights. I even ordered another set for a friend of mine, I think they are great, hope this helps. Sylacauga, Alabama
Thanks Sandra, I did go ahead and order two of the Flashpoint PZ softboxes. I must say the zipper is a good idea. Made putting on the boxes pretty, although I did use another person to be on the safe side, (spring effect while trying to hold the box together and zip it up at the same time.) I took some test shots and really like the soft light. I will post some pics from a child birthday party I have scheduled this weekend.