We just did one of these in Jan. For $99 we got the hotel for 2 nights, 2 adult one day park tickets and breakfast each morning. We had a 90 minute presentation of the Calypso Cay resort. Well, turned into a 2 hour presentation. Would have been longer, but kids were getting antsy - thank goodness. We also acted like we liked the place so that didn't work in our favor.
Overall, the hotel was nice, breakfast was very good. The one day in the parks was enough for us (we had to purchase another child's ticket for DS as they only gave us 2 adult tickets). We had just come off the cruise and decided we couldn't be in Orlando and not do MK one day.
I would do it again but with some guidelines. DON"T act like you like the place, even if you do. DON"T bring your checkbook (they will let you buy into the place for as little as $40 that day and you may be tempted).
It's really up to you if it is worth the trouble for a cheap, short vacation. BUT, they really don't tell you that the tickets are not for 3 days, but for 1 only and just 1 park, not hoppers.
Good luck!