I took advantage of Marriott's "Buy 3 Nights Get 2 Nights Free" for our annual Orlando over New Year's trip and stayed at the Harbour Lake (old Horizons?) resort. We spent 6 nights total there (extended our stay by a day since we liked it so much) and thoroughly enjoyed ourselves. The kid-themed resort had plenty of activities for the kids (some free, some with a nominal charge) as well the two large pirate-themed pool complexes, a miniature golf area, a soccer field (balls are available for playing) as well as other athletic courts. They also have a pavilion with pool tables and spots for grilling. At the front is a boat that looks like it could be used in the pond - but we weren't sure so we didn't attempt to use it. Everyone was extremely friendly - they were always saying hello and smiling. The free washer and dryer came in very handy (soap available at the front desk) as we purposely took fewer clothes than normal due to the airlines strictly enforcing their overweight baggage rule. Of course the kids wanted to spend most of their time in the pool, which was fine with us as that meant we were not incurring unnecessary $$ expenses. The food menu is fine and reasonably priced but somewhat limited. I only have 3 small suggestions: 1. try to stay away from a room that has a connecting door to another room as you can hear everything; 2. The Captain's Quarters should have little kid scissors for some of the projects as little hands aren't used to using adult scissors; and 3. The property should continue the New Year's Eve party for the kids past 10pm (we were there when it was hopping at 8pm, went for a quick dinner, returned before 10pm, and the entire area was dead). The party was advertised from 7pm-midnight with champagne toasts at 8pm, 10pm and midnight, so we thought the festivities would be ongoing the entire time. These suggestions will not deter us from staying there again. It was by far one of the nicest family vacations we had and we will stay there again in the future.
"The free washer and dryer came in very handy (soap available at the front desk) as we purposely took fewer clothes than normal due to the airlines strictly enforcing their overweight baggage rule."
Personally, my wife and I find the in-unit W/D among the most convenient features of Marriott Vacation Club properties. You're absolutely right about having to pack less clothing. At Marriott's Custom House in Boston, the units do not come equipped with W/D, but there is a complimentary Guest Laundry facility on the 24th floor with 3 washers and 3 dryers.