I'll have to dig a bit to find those tests, but I found PC-TEA to give results very similar to Xtol with other films that I tested head to head, and I would expect Double-X to behave in a similar manner. PC-tea has the advantage of very long shelf life, as opposed to xtol, as Tom has stated. I found that the more I printed xtol negs and pc-tea negs, the less I liked what I was seeing. The grain is nice, and the shadow seperation is good, but the midtone and highlight contrast is flat. Since most pictures carry the important stuff in the middle and high end, this wasn't working for me. Increasing development time didn't help and increased the grain. On the other hand, many people like xtol and find that it works for the types of pictures they are making, so I don't want to discourage anyone from trying it and pc-tea out, never hurts to learn new things. PC-TEA is easy and cheap to make. I'll see if I can't find something to post.