Booster Page Speed Optimizer

I just installed but an error is appearing: ERROR 500, INTERNAL SERVER ERROR. when trying to activate the app

Did not see any difference

I'm not sure whether or not this app really speeds up my website.
Before installation first page load time was 1.9s but after installation it was 3.4s

this app has not improved my speed on my website, it seem as if it has made it slower, as of right now i can't rate you guys higher

I first thought this looked like a great app and it definitely improved my speed. Unfortunately, it also removed half the content from my home page (and I tried twice turning on and off the app with copies of my theme and the same thing happened).
I tried contacting support but received a note back saying as it was a free app there is only documentation support.
It might be a conflict with ...

This app is pretty much useless. It does not speed up the website in any way not even 1%. So many positive reviews seem to be fake reviews by App developer.

Diese App hat meinen Seiten Speed eindeutig gebremst. Sobald ich diese deaktiviert und dann aus dem Theme gelöscht habe (was nicht schwierig war) , habe ich sofort wieder MEHRMALS meine höhere Geschwindigkeit (pagespeed insights) messen können. 1 Stern für kostenlos, 1 Stern, weil es problemlos zu deinstallieren war.

hello, please check up my page: https://rave-on.shop ... when its start to loading faster? You can better check the speed here: https://developers.google.com/speed/pagespeed/insights/?url=rave-on.shop
i hope it starting be faster soon...

Installed because of great reviews however my store actually performed worse. Google page speed for Desktop dropped from 84 to 66 and Mobile dropped from 45 to 28. It also fails Speedboosters Shopfiy analyzer. Hope support will contact me to understand why the poor results.

Tested load speeds with pingdom and went from 5.61 seconds to 5.84. I am sure this works with some sites but it certainly doesnt work with all of them.