We have stayed at all the Orlando properties except for the three Palms. Though we will be staying at two of them this year. I have probably posted this before, but here is our breakdown.
Cypress Harbour: While all 2BR dedicated units they really aren't good for an older family. The second bedroom only has a queen and a pullout sofa that when pulled out doesn't leave a lot of room. The kitchen and living area is huge and the sofa in the living room pulls out also. So it can work, just not my top pick with an older family of four. Great for a couple though.
Harbour Lake: Primarily 2BR dedicated units with some lock offs. This is a great property for young families, the property caters to kids. Spash pad, pirate pool, and the only Orlando property with putt putt.
Grande Vista: HUGE. This is one of our favorites. Lots of pools, onsite restaurant and lots of onsite food options. You will never run out of things to do here. 2BR and 3BR units make this great for larger families that want to be able to spread out.
Lakeshore Reserve: Access to the JW and Ritz properties is a plus. It is the only Marriott timeshare in Orlando with a lazy river and I can float around in it all day. More upscale than any of the others, but it is also harder to trade in to than any of the others. It is the furthest of all the properties to WDW.
Sabal, Imperial and Royal Palms: Haven't visited any of these yet, but we are looking forward to access to the World Center property, their pools and that SLIDE TOWER. I have read that access to the slide tower is $10 a day per villa. I am probably the only one in our villa that will use it, but I know I will be using them. Great bargain IMO.