Please, Let's Keep it in Perspective Here!!
I have been going to the Casablanca for more than 10 years now and am a member of the vacation club. In considering the Casa, one must remember that it is not a 5-star Vegas hotel but a 3-star Mesquite hotel with staff that treat it more as an "Inn" than a "Hotel". Friendly, courteous (for the most part) and decent people working a few hours a week in their retirement years (most often).
The hotel reception staff could use more customer service training that is true. But overall, the lack of polish isn't rudeness as much as it is lack of finish.
The golf course, pool and spa staff are fantastic. The casino staff are good but perhaps not as flashy or sexy as Vegas staff.
Katherine's restaurant is as good as any 5-star Vegas resto, at half or 1/3 the price.
Oasis steak house is also very good. The Casa's buffet is very decent food for the price as is the buffet at the Oasis. The Purple Fez (in Casa) could use a facelift both in decor and staff.
Remember, if you want to relax, have some fun, play good golf courses and NOT spend a King's ransom, Mesquite and the Casablanca are for you. If you expect to be waited on hand and foot, go to Vegas and pay the price.