I accepted one of their offers for a hotel stay (not in the timeshare, but in the nearby hotel) and timeshare presentation. It worked out fine ultimately. There was a bit of a problem finding a time that would work for me. They kept coming up with days that were one or two days different than what would work for my schedule, but eventually I found something.
The presentation was scheduled on my last full day at the hotel and did take a chunk of time out of prime time for the day. The presentation was fairly low key. When I said I wasn't going to buy into a timeshare at the end, the rep wanted to know how many of these I attended. It was my first and only.