Having been a member for over 5 years and only ever successfully completing a single interval exchange, I finally given up on this company. My membership expires in April 2011 and I will never renew it. If any of the other 2, 000, 000 members they claim are smart, they won't either!

We had deposited a week that was going to expire soon. So we thought we'd see about getting to Hawaii. Well, forget it. Despite hundreds of resorts and a two month search timeframe, there was nothing we could use. Thought we'd try San Diego. No luck there either. Finally I resorted to finding a place with loads of availability which turned out to be Orlando FL.
Despite lots of available units, there was almost nothing that met our requirements (2 BR, 2 weeks back-to-back). But we did find one. So we tried to book it. Stupid website demanded that we set up a new customer profile. OK, so we did it.
Then, when we tried to book, we'd get part way through the process and a click would send us to an empty screen. It happened in various places so it was obviously some sort of endemic problem with their website software. Finally figured out that if we went back to the previous page and re-clicked the link (sometimes repeating the process more than once!) eventually it might actually work. Gave up in disgust and waited to call them on the phone the next morning.

I was on hold for the longest time. While on hold, I was informed that if I made my exchange booking online instead of by phone I would save $20 per week. When I finally talked to an agent and made my exchange bookings ($89 to renew my membership plus $159 times two for the exchanges) I asked that I only be charged the "web rate" since it was not my fault that there website software was failing. Told it couldn't be done. Asked to speak to a manager and got connected to a "customer service" representative. After much time on hold, I was told that I could not speak to a manager since they were not accepting any calls "due to high call volumes". I think I know why!
At last in disgust, I told them I wanted to cancel the whole transaction. I encountered some initial resistance but when I stated that I would simply call MasterCard and have the transactions "charged back" to them, they quickly arranged to cancel them. (It seems that a "charged back" credit card transaction actually costs them significant bucks so they probably avoid them like the plague.) We did call MasterCard and had a note placed on file so that if II were to try to sneak the charges through, we would have no problem arranging for an immediate charge back. Better safe than sorry!
So, as of now, I'm done with Interval International. If a significant number of however many members they actually have wise up and also cancel or refuse to renew their memberships, maybe these people will wise up and start to treat their customers decently. I have seen many complaints on this and other boards about Interval International and have come to the conclusion that many people with eligible exchange properties are simply opting for the much more remunerative option of directly renting out their units through services such as OwnerDirect.com, thereby cutting out exchange "services" such as Interval International as well as any rental manager at their resort. That's the route I plan to explore!

Is anybody with me?