Although we always eat at Akershus, unless your family really loves unusual (that is to American palates) food or you're of Scandinavian descent, I would pick a different restaurant. I don't know your family, but if we could only do one Epcot sit-down, Teppanyaki would be the one that appeals to all 5 of us. (I personally would choose Marrakesh or San Angel, though.)
Akershaus is a beautiful restaurant and the servers are IMO the absolute best in WDW. It is true that you can make a deli sandwich (ham not roast beef when we were there), but I doubt that you want to pay that price for a roast beef sandwich! My dh loves this restaurant and we always go -- sometimes I find it "okay" and other times really love it because the menu varies a good bit. That pork dish chellnjr mentioned is one of my favorites there -- and they did NOT have it on our most recent visit.
They also have discontinued my favorite salad b/c it wasn't really Norwegian.
If you decide to go, have your kids to look at the buffet before ordering -- if they find very little they like, there is an unadvertised kids' menu. My oldest son ordered from it when he was about 16. When he was 17, he thought the pot roast looked good. This year, he went to the Electric Umbrella while we had lunch!