I've only just seen this thread, hence the late reply. I very much wanted Dot to try this but, like Mark's cats, she had other ideas. We tried the AG Sensitive as Dot has a rather volatile bum but strangely, she liked it in the sample bags but wouldn't touch the stuff in the big bag. I contacted AG, who are very friendly people, but they had not had any similar complaints (I wasn't after my money back, I just thought they might like the feedback). I passed the scarcely touched big bag on to a friend for her cat, Polly. Polly thought the food was fine and has eaten it with no probs, as far as I know BUT Polly is an ex- street cat and Dot is a pampered pedigree, so there may be a HUGE difference in what they both consider edible!
I think AG is better than RC - if you can get your cat to eat it - the ingredients are of a higher quality and are more geared towards a cat's nutritional needs. If you go to AG's www and contact them, they will send you sample packs, which (hopefully) saves you the outlay on the big bag. Dot's back on RC Sensible + a probiotic supplement and she has a nice stable bum at present! I hope you have more success than me and Mark, should you decide to go for the AG.
C.