What I especially like about getaroom is that there is transparency (at least on the rooms I researched) about the dreadful "resort fees" only mentioned in passing on PL. While looking at the MGM INt. Luxury Suites, they are right up front about:
The hotel charges a mandatory resort fee of $20.00 per night, payable at time of booking. This fee includes wireless internet, free valet, 24-hour concierge & room service, 24-hour fitness center, daily newspaper at the front desk, access to The Signature and MGM Grand pool complex and lazy river ride.