Invisible Height review for Aftersell Post Purchase Upsell

I'm going from 5 stars to 2 stars because it never worked, in 3 days the upsells were only displayed for 1 customer and on top of that, the pixel didn't even detect this sale. Customer service, apart from Patti, is extremely slow and bland... None of my requests, however simple, were resolved and these 3 days of using this app were enough to reduce my ROAS from 2.11 to 1.32... and I really regret having installed this app!