Spotlight is by far the best out of them all and for quick search like an app it works very well. But if I'm looking for some weird file that I don't know exact name of it becomes pretty useless and I have to use a third party app with filters to find it. I just wish spotlight had some more advanced options with easy acces to them. But from what I'm seeing I won't hold my breath for it as apple is really focusing on simplicity (that is on the surface under the hood is a different story) and is removing advanced features making OSX more and more like iOS but I sure hope I'm wrong or uninformed