We used Mazuri for a while a long time ago, and it was like feeding your toddlers fiber. Yes, it's completely healthy for them, but no one would eat it. They'd dig through their bowls and baby weights were low, adults lost weight and eventually mallocluded. If they don't like the taste, they won't eat it no matter how healthy for them it is. I don't like Mueselix (sp?) myself either.
Now we feed PANR and mix it with Vigor Plus which is a "calf-manna"-type supplement, but our chins are breeders not everybody needs to provide a supplement. Oxbow is something we tried too, but the cost savings and how our chins dive into the PANR is what sold us. Baby weights are the best I've ever seen for the last few years and weaning survival is at it's best.