I had a go at the Tetenal C41, put a roll of Fujifilm Pro 160s through it and once more, I was very impressed, I can safely say now that I can give the finger at some labs (got fed up of getting scratched negs all across the middle of the photos and ever expanding developing prices). The only thing I may have improved in developing my film was that I extended it by nearly a minute as the temperature was slightly 1.5 degrees over, so the film came out grainier than what I wanted, but not that bad. Here's one (I hope the size is right for the forum, I sometimes get the size just a little over):
I have an A3 resized version that holds up pretty well. So yeah, I'm pretty happy with both the E6 and C41 Tetenal kits.