Don't pay retail...
We stayed here for 2 nights. I used my HHonors card and a discount code to get what I thought was a great rate for a Hilton. I applied for available upgrades, and got one for a One bedroom suite. Score!
The front desk was friendly and welcoming, and gave us free breakfast coupons for the restaurant since the Executive Lounge is closed on weekends. Very cool.
As we walked down some serious long hallways, my enthusiasm kinda diminished. Stained carpeting here and there. Room service tray left out (that we saw many hours later, but apparently was picked up that morning). Hmm.
So, we got to the room, which was in an odd 3 door cubby in a corner. Upon first opening, you're hit in the face with this smell. Like someone let a wet dog in the room, but then left. It wasn't like "Oh dear god in heaven", but it was REALLY persistent. To the housekeeping's credit, the sweet lady named Maria (she made a point of introductions, and was very pleasant), left us a bottle of air freshener for the weekend. We used it many times, but could never get the smell to go away.
The rest of the room, while spacious, is horribly dated. The furniture has it's fair share of bumps and uncountable scratches. The overall decor is probably 20+ years old. The curtains had small tears and stains all over (what I hope was ketchup, but I didn't dare investigate closer). Even the baggage/bell hop cart was gross. It looked like noone had ever cleaned it.. fingerprints, smudges, and smears of god knows what on all the bars. It was VERY disappointing for the quality I think of for a Hilton.
Aside from the sofa bed having old sheets still on it (the other reason for calling housekeeping), crumbs and hairs included, the room was clean however. The bed was clean, the sheets clean, and I am meticulous about checking this (the idea of bedbugs or something scares the bajesus out of me). All clean, and that was good. The towels were heavier weight, and there was PLENTY! The bathroom, while dated, was incredibly large. It is seriously showing it's age and wear, however. Paint peeling on the ceiling, one too many caulking attempts in the shower, the jetted tub looking quite well used, etc. But it was clean and stocked. A lot of the finish work seemed to be odd. Something missing from the kitchen (a dishwasher?), door protectors being cut crudely to fit around door knobs, etc. Our neighbor's door seemed like it had tape holding the peephole together.. no idea there, I didn't stay to study it.
 The staff were all friendly, and the only problem I had in a staff-respect was that nobody answers their phones. Seriously. Housekeeping took 3 attempts, a few minutes a piece. The front desk one night took 4 attempts, including even calling the hotel's phone book number to try and get a hold of anyone (note: they charge for local calls. I got them to remove that $0.75 charge after showing that I was trying to call THEM from my room. which brings up a point... 0.75 cent for a call that no one picked up??? Wow). 
The hotel is fairly quiet from the road noise, which is loud outside. However, we heard jets taking off all night from the airport. It sounded kind of like thunder rumbling, so it didn't bother me much, but for those looking for absolute silence, I don't think you'll get it. The plus side is, it's crazy close to the PHX airport. 
The a/c worked great, and will chill you out if you forget to turn it down.
There is a restaurant onsite and a "gift shop" of sorts, but honestly, it's a bit pricey. $3.99 for a 1 liter bottle of water. When I asked my hubby how much the breakfast buffet was if he had paid (we got coupons for it), he said it was something like $15/person. So, plan accordingly.
So, overall, it was an okay stay. The service was good, but the room was a big disappointment for what I expect from a name brand like this. If I had to pay full rates, I would have been seriously mad. But, the event we were attending was right in the hotel, and that saved us a lot of effort and gas money, so it worked out well. I might stay here again if future events are held here, but ONLY on a good discounted rate.