Betfair, is a betting exchange rather than a bookmaker and this is what sets it apart from the rest. They provide person to person betting where you can "back" or "lay" an event without the bookie inbetween taking a cut, consistently gives you the best odds you will get when betting. This is how they can claim to take over 300 bets every second and have become the largest online betting company in the UK and the largest bet exchange in the world.
After you make your first £25 bet they will give you £25 free. Regular customers are rewarded with further free bets.
To become a member just click on "Open an account" on the top left of their site. Then fill in the quick registration form. Enter the promotion code detailed when joining Betfair and you will qualify for a £25 once you bet £25.
Betfair have a well designed site with their now famous cartoon caricature theme running throughout the site. They have a massive range of sports and markets that is sure to satisfy you.
Betfair's exchange system is second to none. You will almost always find the best odds and you can even set your own and see if someone will "lay" against them. Alternatively you yourself can choose to "lay" - bet against an event winning.
Another great feature of the betting exchange are the unlimited betting limits. Bookies will limit the stake you can bet on one market, but at Betfair you can always see how much is available to bet on a particular market and as long as you have the funds, then you can bet what you want.
Betfair also have the best in-running betting. You can bet on almost all markets while games/races are in play.
There are lots of features to help you on the site, including the forum and a help video for newbies to the betting exchange system.
One point to note is that a commission of between 2 and 5% is take from your winnings varying on how often you bet. This is how they make their money.


