the check raise is extremely useful in limit hold em to juice the pot when you catch a monster hand. or to protect your hand against limpers. however in NL if you want to get more money in the pot, all you have to do is bet more, and at a loose table, you'll get called. same deal with protecting your hand, if you bet enough, the limpers will go away. so i tend not to checkraise in NL unless an obvious trapping situation presents itself. e.g., i bet my draw, guy raises with TP, i call, hit my draw, check to the raiser, then check-raise his ass with the nuts.

ChezJ