I've seen mixed reviews about this thing but bought it when it first came out anyway, you can tell it was doing something but it was pretty meh overall and didn't feel like it was worth it.
Since it's been synced with scripts it still doesn't quite feel like it's making a massive difference in the ways kiiroo marketed it as but it's still pretty noticeable, however i have noticed that i'm lasting half as long as i did prior to using it which is pretty impressive and it's clearly doing work. (i haven't played with any vacuum strength settings at all, just as is)
Big thanks to the people who did the work on this working with scripts because i am really enjoying the difference its made.