I went to Amraj last night. I'd only rate the food as ok, though that may have been my choice of meal rather than indicative of the restaurant as a whole. I thought the food was a little too mild, I don't like burning hot curry, but I expect to taste the spices in something described as a medium!
Also the portions were a little on the small side and a little more expensive than I'm used to in Sheffield.
It didn't come close to my favourite, Butlers, but if you're taking your Mum out Butlers might not be the best location as you are likely to spot 'ladys of negotiable affection' wandering past the window!