Probably the best option in Astana, especially if you want to be sure the quality is where you expect it.
Not cheap, but you get what you pay for. Club Lunge is not worth the upgrade. Breakfast very good even on Ritz standards.
Staff is very friendly and good wot work with. On-site restaurants are decent, Selfie on 18th worth mentioning for the impressive wine-list and splendid views of the city.
Definately will be back when in Astana.