I was in Scottsdale for seminars two months in a row and I decided to stay at Xona because the price was right and it is close the seminar site. I have to say for the money I paid, I was impressed with the resort as a whole. On my first visit they placed me in a huge suite. It was essentially a converted apartment: kitchen with full sized fridge, dining room, living room, and separate bedroom with a decent bathroom, two flat screen tvs and a small patio. Kind of place you would pay $$/ month in Santa Monica. My second stay there was not as spacious, but the beds were comfortable enough.
The other facilities were nice enough, but I didn't have a lot of time to scout around. I know there were at least two pool areas each with a hot tub. The exercise room was a little on the small size but sufficient considering the number of people I saw working out in there each time. In the center there was a small restaurant with an outdoor patio and a small band played each night I was there.
My interactions with the staff was positive. Not quite four star but polite and efficient. Overall, I would have to say this is a great value resort. Not the most modern and updated, but it will do in a snap the next time I'm in Scottsdale.