I agree with pukalo. I have been using the Tetenal kits now for 6 months and am completely thrilled with the results. I've developed over 100 rolls and dozens of sheets of film with beautiful quality and colour. I am sad that the good 'ol Yellow Kodak kits are no more, but Tetenal has filled the gap quite seamlessly. I've found no longevity issues with the Tetenal kits either and am so confident with the results that I have decided to start up my processing services again for those who have no time, patience, or interest in developing their own colour films. Check it out at www.e6it.ca