FWIW, I've used a Paterson Chrome 6 kit for three 35mm rolls now. The first two rolls came out fine. The third roll had magenta shadows (including the sprocket and inter-frame areas). The troubleshooting guide says this is a sign of contamination of the first developer with the color developer. I can't rule this out, although I thought I was being careful to avoid this. That's the extent of my experience to date, though. FWIW, I bought the Paterson kit because I was buying from B&H, and they would ship it, but they wouldn't ship other E6 kits. I believe Freestyle, Adorama, and perhaps others are more willing to ship other E6 kits, albeit only by ground.