I had a great deal of success controlling the flea infestation with Meteor IGR. Its highly affordable too! It gave me hope that those stubborn fleas would not be in my apt. forever. HOWEVER it couldn't seem to eradicate the fleas. Each infestation is different, but for my severe infestation, Meteor only controlled the fleas so that I didn't get bit so much. I wouldn't recommend it for the tougher infestations of fleas. Great for lighter infestations though.
Expert response: Please note that Meteor does not kill fleas. Meteor prevents immature fleas from developing into mature breeding adults. It is recommended that you mix Meteor with an insecticide for flea control.