Our beagle was really neglecting her food to the point that we were worried about it affecting her development - regularly eating only half what she should have been - which she'd attempt to "supplement" by hanging around for tidbits and training treats. Since switching to Burns food the change has been great: she finishes the bowl every time in each of her daily sittings, as a result her stools are much firmer and more regular (which any owner will appreciate!), temperamentally she seems improved - all round calmer and more attentive/easier to train, "mad half hour" before bedtime is much less of an issue, better behaved around our eating (although not perfect!) and she seems less prone to anxiety when we're not around.
It's nutritionally a better quality food so, while it's more expensive than many of the brands out there, there's less "filler bulk" so you do need less which is handy when travelling and also means less mess. And ultimately there's no point paying for cheaper food if it's a struggle to get her to eat it.
Highly recommended - she's loved all of the foods from the range: the lamb, chicken, pork and duck.