So would it only be helpful in conjunction with laser?
I think so. They claim that they have "evidence to indicate that photodynamic therapy using SL017 [code name of the topical formula] could be a potential simple and rapid method for permanent hair removal...Use of SL017 with a light based hair removal device is likely to overcome some of the limitations (low efficacy on blond, red or white hair) associated with light treatment alone."
They also claim that it "can work with both laser and broad spectrum light," perhaps only "a single treatment" is needed, and it can treat all hairs and hair/skin combinations.
http://www.questpharmatech.com/sl017.htmSeems too good to be true, and so did laser at one point, and well laser has proven to be counteractive in my case.