I just returned from 2 days in Saipan in April. We stayed the the Century Hotel, and it was nice enough. Overall, we were disappointed in Saipan because of all the dodgy gambling houses and hookers. Hookers approached me on the street while I was walking with my wife. We felt unsafe in Saipan, and thought our things would be stolen at any moment. We were glad to leave, expecially when the only cafe at the airport sold $5 water and soft drinks. I wouldn't recommend Saipan to the island traveller - Guam and Palau were so much better.
The Aquarius Beach Tower got mostly great reviews, and none of them dissed Saipan. Well, except for "Also, you will be far away from Garapan, the crowds of tourists, cheesy shops and hookers."
A personal view for readers not familiar with Saipan: the hookers are certainly all over Garapan, but generally not too aggressive (at least to 'statesiders'; you can say haole if you're smiling). Either it's getting better or I don't notice as much. The problem still needs more attention, but for me it's certainly not threatening or dangerous.
That said, I had one lovely lass try to jump into my car when I was leaving a general store. Walking over to the Paseo de Marianas for my five buck Thursday supper-- which at today's grocery prices here is cheaper than cooking for the family-- makes me feel like Robert Stack wading through the airport Hare Krishna in the movie Airplane!. My son asked what a 'massageee' was on our stroll there last week. I said a relaxing back rub or some such nonsense. "Let's take a different route back," I suggested. "Maybe I can get another offer." I did.
It's not just the night ladies; Garapan restaurants have their hawkers on the street too, though they usually stick to the Japanese tourists.