My SSQV knockoff works great. I prefer the SSQV and similar times over the Greddy style because theres no need for adjustments.
Though in all honesty the BOV sound is getting kinda old and I may be looking into a recirculation fitting to run mine as a BPV instead. Theres a few benefits to this... such as less annoying BOV sound, no oil spraying out of it, and possibility for better performance and mpg because Im not venting metered air. Should give my festiva more sleeper appeal too.