We used the TSS to sell our contract in 2009 and they did a wonderful job. It was as easy as calling them, giving them the details of the contract, they got some information, put it up on the website and I had a buyer in 24 hours.
We needed a delayed closing (4 months later) as we were traveling on the membership and this piece did nothing to deter us getting it sold quickly and efficiently.
While we did have to pay the commission for the sale, well worth it, IMO, to have it sold and gone with such ease.
Good luck!