Dès Vu review for Every Possible Discount

We've used this app for a promotion where we wanted the sell any product for £1 with a maximum use 5 uses per code. We ended up with 1045 orders valued at £1. The limit worked fine in our tests but with multiple people checkout in the same time, there is a massive delay on the app side and basically multiple people were able to checkout with the discount regarding the discount limit. We are now in a big mess. I would not use this app for product drops and for high traffic promotions. Besides that i believe all other reviews are fake as we couldn't find those stores on google.