+ Generally Better prices, All fixed. The advantage is that you can place a fixed odds bet on a race where there will not be any early prices from say Ladborkes or Blue Sq. This is excellent if you know the price is coming down.
+ You can also lay bets as well. As an example last year I had £200 @ 7-2 on Cardiff going down after they sold Kavanagh to Wigan. After a big Plunge the price on betfair was 7/4. I then laid off my bet on Cardiff at 2-1. Either way I couldn't lose. This feature is particularly good if you know something is not going to win. Henman at Wimbledon has won me a fair few quid over the years.
- They take a percentage of all winnings as their 'tax' for using the site. So if you have £10 @ 10-1 and it wins you lose a percentage to Betfair. This has the disadvantage that it can be difficult to work out what odds you are getting.
Look up Betfair and Free bet on google and you will find a free £20 bet code as well. Use that and see what you think.
Also you can back horses for a place without having to put a bet on it to win as well (if you're not that confident that it'll win, but sure it'll be thereabouts).