cany, not sure what you're referring to ... the Wicked Spoon buffet @Cosmopolitan? Haven't been myself, but a foodie friend went once and liked it, for a buffet.
I've heard great things about the Golden Steer, more about the ambience and service than the food. It's very "old Vegas" - i.e., tuxedo-clad waiters, white tablecloths, salads & desserts prepared tableside. I've never been myself. But if you do go, you HAVE TO make sure you get the Robert DeNiro look-alike waiter. A foodie friend showed me a picture they snapped on their phone. Holy bleep! the guy is the spittin' image of DeNiro!! If you call and specify that you want the DeNiro look-alike as your waiter, they'll know what you're talking about. People ask for him all the time. I have to go one of these days just for the experience.
A few off-Strip recommendations:
Gandhi or Origin India. Try Gandhi for traditional Indian cuisine. Good food and great prices! Try Origin India for more innovative fare, kind of like "nouvelle cuisine" Indian. Origin India is a little pricier than Gandhi, but still far less expensive than the Strip.
Lotus of Siam. The best Thai food in Vegas. I'm a huge fan of Thai, been to countless Thai restaurants in Boston & NYC. Gotta say, Lotus beats any Thai restaurant I've been to in those two cities.
Rollin Smoke. The best BBQ in Las Vegas! I grew up in Kansas City, which means I'm a total barbecue snob. Only 3 BBQ joints in Vegas actually wood-smoke their meat. All the others just sprinkle a little Liquid Smoke and throw it in the oven cuz they're bleepin' lazy. Boy, does that chap my ass!! Anyway, the link I posted will get you 10% off their already reasonable prices.
Yonaka. It's not traditional Japanese sushi, more Japanese/PanAsian fusions conjured up by a very talented chef whose staff affectionately calls him "The Mad Scientist." My favorite dish here is Niku Berry - grilled beef tenderloin with strawberries, pistachio butter, enoki mushrooms, and sugar-dried fennel. Sound crazy? Just wait 'til you combine all the ingredients onto a big spoon and put it in your mouth. Check them out on Yelp. Vegas foodies LOVE this place!
Raku and Raku Sweets (no website yet because it's brand new). Raku is a Japanese charcoal grill - fresh, high-quality ingredients mostly cooked over charcoal. They offer many dishes you might not have tried before. I've tried a bunch, have never disliked anything, and loved almost everything. Raku Sweets is the Vegas version of NYC's very successful Chikalicious, that is, a 3-course dessert bar. You get an amuse-bouche (a small pre-dessert), dessert (the "main course"), and a small post-dessert dessert. If you're thinking it's all too much sweetness, Japanese pastry uses far less sugar. You can actually have 3 dessert courses without any cloying sweetness. It's in the same strip mall as Raku. It's so new it doesn't even have a sign yet. Look for the big silver spoon in front or just ask the folks in Raku where it is. If you have a car, try Suzuya, another Japanese pastry shop. I had no idea Japanese did such fine pastry until I discovered this place. All you ever see for dessert in Japanese restaurants is mochi or green tea ice cream. But the crepes and pastries at Suzuya are divine, as good as Raku Sweets, but far less expensive. I loved Raku Sweets, but it's pricey. Their 3-course dessert is $19, or $25 after tax & tip. But it's worth it once for the experience.