My personal opinion is that timeshares are a huge waste of money (I am sure some people here will disagree) and by going there, they are going to do a very good job of pressuring you into buying...I hope both you and you SO have strong will-power.
That said, the location of Tahiti Village is not all that bad. Sure, it is way south on the Strip, but there is only one direction the Strip can grow, and that is south. There are already plans to build two new large casinos at the FAR, FAR end of the Strip at St. Rose Blvd. So eventually, Tahiti Village might actually wind up in the middle of things - which is a good thing/bad thing depending on how much you want to have a timeshare in the middle of things.
But seriously, for the money this timeshare will cost, you could probably afford to fly to Vegas once every year for the rest of your life and stay in a nice hotel/casino - and not be locked into paying yet another mortgage...just my humble opinion.