138.com are a solid bookmaker.
They used to do Asian style handicap betting, but now they're a traditional European style bookmaker, but they're none the worse for that.
Good customer service, quick withdrawals and decent odds and markets make them a very useful account to hold.
Exclusive to The Gambling Times there's now a £138 sign up bonus available, instead of the standard £50.
Along with that, you can also get a £38 reload bonus when you're done matched betting your way through the sign up bonus. That's £176 of bonuses, which only Bet365 and their £200 sign up bonus can really match.
You can't get this bonus direct from 138.com, you need to sign up through this terms and conditions page on The Gambling Times and then contact live chat (who are always very quick and helpful) with the bonus codes.