There is a prodigious amount of marketing information produced by the manufacturer of the Femtosecond™ laser that it can reduce the complications and even increase accuracy of results. However, there are very few peer reviewed studies that substantiate this in any way. Most recent studies conclude that there is little to choose between them so you must ensure that the information that is being compared is relevant.
A clue as to why Femtosecond™ laser treatment is recommended by certain clinics can be found in the charges that are levied by those clinics that use them.
You can read about the reasons why WE do not use Intralase™ here