I feed Orijen to my 2. Prior to that I fed Eukaneuba, Burns and Barking Heads but, they were fussy with these brands and their coats weren't as good as they are now. They however love the Orijen. Id heard it can cause loose motions so i changed them over very slowly.
Re cost - the large bag (13.5kg) I pay £55. This currently lasts Blossom and Ziggy 45 days, which works out to 61p each per day (they eat 300g per day between them). Burns used to cost me £45 for a 15kg bag but, they used to have 360g/day, which worked out to 54p each per day. When I fed Burns, I also had to supplement with Naturediet or similar to get them to eat it, which I have not factored into the cost. So, assuming my calculations are correct at this time of night, Orijen isn't really costing us that much more and they now eat their kibble
I do have to make sure I order in plenty of time as I get ours from Zooplus or Pet Planet at the moment - free delivery x