One of ETTSI's main purpose is to fill seats at time share presentations. As far as I can see they do that well. If you want a travel agent, pay one.
ETTSI's terms and conditions regarding cancellations, rescheduling, and participating in the presentation are clearly spelled out in the initial brochure, the verification form, the contract and the details of participation form. If you want to make one phone call and have everything taken care of... pay a travel agent.
ETTSI scheduled us to tour Kings Creek Plantation in Williamsburg, VA. As luck would have it the tour was scheduled the day hurricane Sandy struck the Mid-Atlantic states. We called Kings Creek, were handled personally by the woman who answered the phone. Things were pretty confused since many people left as soon as hurricane warnings started. Finally we were told that Kings Creek was closing and we should reschedule. I told them about the rescheduling penalty and they told us that we would be all right.
We were rescheduled by ETTSI well under the 60 days required and took the tour at Kings Creek. The salesman was delightful (a Ford quality control supervisor who took the job to pay for his quilt collecting hobby. The cottage we stayed at for three nights was great and we plan to return next winter as paying guests. (Those brand new buildings were not yet 'shared' so they are happy to fill them for $79.00 a night; pretty nice for a townhouse type apartment.
I wrote ETTSI immediately after we fulfilled the terms of the contract. ETTSI needs the time share company to first notify them that the time share obligation has been satisfied. Their information states that a 45 day wait is usual for you to get back your $50.00 refundable deposit. After 45 days I faxed the same letter. We got our check within a few days.
Every transaction with ETTSI was handled in a professional manner, including the rescheduling which a special person was assigned to. Rescheduling was handled by email and the necessary reservation form which was emailed and mailed to us, and returned by mail. No mention was made of why we rescheduled the day before our presentation, or why we asked to be rescheduled sooner than allowed. Of course I did make that clear in my correspondence. I also took notes of everyone I talked to, when and what was said. It wasn't necessary; they handled our special case with no problem.