FreeToBook is brilliant. Fantastic service with real people answering queries via the help system or by phone. A small UK business where you get to know the people running it. The channel manager is brilliant. You set up the pricing and discounts you want on FreeToBook - very easy to do, and they setup these discounts on all your channels for you. A single place to maintain prices - a dream. And the costs must be the lowest in the industry at £1 per booking!
@Helen3 I've been using FtB on my website for years, but only recently as my channel manager. I'm with AirBnB and Booking.com. Syncing is automatic and instant.