I am finishing up escrow as a buyer. Seller listed through Redweek using their full service.
Gotta say that the go-between people have been helpful, straightforward and prompt in their replies.
Early on, they sent me a timeline and things have held very close to that timeline.
Negotiation was handled through the go-betweens also. I had no issue with the asking price, but I had caveats: I wanted seller to reserve specific weeks for next year, and wanted them to agree to have first usage be 2018 rather than 2017. This meant seller would have to take the responsibility to rent their 2017 week that had already reserved. Seller agreed and I never had to deal directly with them. There was no back and forth on this.
I also have another full-service Redweek purchase waiting on ROFR right now. I had the exact same caveats on that purchase and seller agreed. Was all handled through the full service.
The only money I was asked to put up front was a refundable $500 good faith deposit upon both parties signing purchase agreement. Seller also disclosed confirmations of the reservations of they made (go-betweens called Marriott to verify them).
As a BUYER, I would do the full service in a heartbeat (as it was totally paid for by seller). In fact, as a BUYER, I see it as a perk at this point. If I saw two listings for same price through Redweek and one was full service and the other not, I'd pick the full service.
Not sure I would use it as a seller. This is costing the seller a pretty penny ($525 on a $5500 sale).
I would say that the only difficulty I faced is in the way the closing docs were drawn up. I live in California and escrow was out of Florida, and this was for a Hawaii Marriott. The closing documents were not "notary-friendly" for the state of California, and three notaries I went to balked about following the instructions as stated in the docs. Had to do with lack of precise wording on notary page (as of new wording required 1/1/2015), and a page where notary was expected to give proof of being a notary, which is evidently hunky-dory for Florida notaries, but not for California notaries. I would have expected this company's legal department to draw up closing docs based on the state in which they will be notarized. However, after an E-mail exchange they quickly provided me with instructions on handling the docs for California. This all happened on a Saturday when their office was closed. That's pretty good service.