In theory its a good program, and I know people on here that use it and make sales.
Only problem is all you can do is iframe their content, really tricky to get it as indexable content.
And you can only book via phone, but you get credited for these, obviously
I made a sale last month! and i dont even do travel, but I only got about £7 sommat for it. But that was on hardly any traffic and non targetted so its something ill be having a better look at and worth a go id say