What would you like to know, my good man?
Yeah, you just mount normal fans to it. You can even mount funny shaped ones like Thermalright TY-140's.
The design is sturdy.
Is it worth it? Depends on your setup.
What GPU and case do you have? How were you planning to use it?
It should do as it uses screw + nut fittings to secure the fans to the bracket. Basically, you bolts fans on to it, rather than screw them to it.
You should be able to use the bolts on all four holes to attach the fans to the bracket.
To make it more secure, screw the silver plates into the fan which should make it pretty solid.
See this pic of my old setup for a rough idea, though the configuration is slightly different as I'm only using two bolts.