I've used Nature's Menu a few times but I hate the pouches it comes in, I find them really fiddly and messy to get all the food out properly and the food itself is a bit mushy. I prefer Nature Diet, Tilly has this every day and I've never had any problems with it being 'off' although I know others have. I've seen NM in Tesco as well, you can buy it in multipack boxes but I have to go to PAH to get the ND.
I bought some of the frozen Nature's Menu nuggets for Alfie to try as part of his barf diet, he seemed to like them well enough but at the amount I had to feed him it would be too expensive to use them all the time, the freeflow Prize Choice mince works out much cheaper.