I will say up front that I haven't had extensive experience with Switchblades, or 'Automatic Knives' but the ones I have handled all left something to be desired in the 'Quality Department.' I carry a 1981 vintage Case Mako, which is a pretty substantial knife. It has a thumb stud on the blade (which I installed.) I can open it one handed, about as fast as a Switchblade will open. And it's a much better made knife. I have never seen the fascination with what is pretty much a piece of junk. At least the examples I have seen were junk!
Other folks' experience may differ from mine. Or as the car ads say, YMMV.