My results were different than arkoshkobash's - I found that after about 15 8X10 prints I started seeing a substantial drop in contrast. I can't remember what dilution I used though. And also two hours in the tray was about the limit before some sort of replenishing was needed. My results won't necessarily be yours, but this was my experience. I have since moved on to a different paper developer (BW-65 from Photographer's Formulary) and am quite a bit happier than I was with the Edwal.