Yes. The operative word here being BANG lol Piggy backs suck for all the reasons already pointed out. I had an HKS piggy back back in my DSM days and it was an inconsistent, boost creeping, surging POS. But in the early 90s that and standalone ECUs ($$$$$!) were all we really had. Nowadays we have actual tunes, custom even if you put in the time and money for an eTune. Waaaay more comprehensive than a set it and forget it magic box.
And all of you...ALL OF YOU.. BLEW IT. He said UNDER 500!! This discussion is moot as an AP can't be bought for <500. Yes i'm counting shipping
Now for under 500....Sway bars, springs, and interior LEDs.
No, intakes don't count as gaining 5 peak hp for $300 does not meet the bang for buck criteria