Dual band wifi speed boost

[ov1lord]

I recently found this option in wifi assistant settings and I'm curious if it actually improves your speed or its just a gimmick!? It's worth using it or it impacts battery life?
I'm using a xiaomi mi 11 miui stable 12.5.7 and when I activate the option it's connecting to 2.4ghz and 5ghz networks from the same router

 

[Tsim Pouki]

Of course there will be a small impact but nothing crazy. I use it and it helps me