Ignoring the fact that these aren't full coilovers (they retain the OEM separate spring and shock assembly, not a bad thing in itself) then the real benefit in terms of performance is for those guys that are on 100k mile cars still running original suspension: Those parts will be nowhere near as good as they were when they left the factory, so these (and the equivalent Meister and BCs) will be a massive upgrade. You'll get far more control, and likely a better and more compliant ride than on stock suspension for a fraction of OEM replacement cost.
Of course, you also have the ability to stiffen things up for a sportier ride, however don't be fooled into thinking that hard = better. That's not always the case, remember when the JDM cars were slaughtered when introduced to the UK as grey imports because they bounced everywhere? The UK suspension was much comfier, and suited our roads better. It depends on what you want from the car. AIUI, the Torqen suspension can be set from slightly softer than OEM to ridiculously stiff, which gives you the option of running it either as Nissan intended or as you deem fit.
You also get to adjust balance between front and rear, something you can't do on the stock setup, which opens up a whole new world of car control and playfulness...