Summary: Replaced an older non-module unit with this. Took me and my son an hour or so, the lengthy bit was changing the cables, I was initially a little confused about which cable replaces which old cable, but eventually got it going, could have done with just a little bit info, for example I am still not sure if the voltage supplied by each module is the same as long as the number of pins are the same, I just assumed so and so plug them in what ever order on the power supply...
Summary: Went from a Corsair Enthusiast TX750W to this, and this is hands down the better product. Pushes out extreme power, and the ability to remove the cables you don't need makes space management in your tower a breeze. Highly recommended.
Summary: I had this happen with a 1kW CoolerMaster PSU. Basically all consumer PSUs use cheap sockets there instead of Molex HCS sockets. Just to give you some idea how silly this is, those sockets cost. You can then lead the extension through a passway to the rear compartment, and make the connection with the Corsair cable there easily where space is unobstructed.
Summary: The modular wires are for the drives, fans and GPUs, not quite 100% modular but I guess they figure 90% of the time you'll be using the wires they have hardwired for the CPU and motherboard plugs. But anyway, the true test of a PS is how long it last. I run mine 24/7 and they generally last a couple of years. We'll see how this one does.