I couldn't understand why my sis was going on and on about it (and she's British) because I thought well all fish and chips taste good. This is a fact, however some fish 'n chips taste better. The deep fry is so beautifully done, it's like an art. The chips are great, too.
I'll be honest - only had it for takeout so can't speak to the quality of the sit-down experience but food-wise it's a definite gem if you like deep fried stuff, which, I mean, you should, really.