I purchased this deal and found it really works well. I've used it constantly since I am doing a lot of online meetings and it truly filters out all the background noise - in other words, it works as advertised. The problem is that 8 months after purchasing the lifetime deal, they downgraded my account to the free account which limits you to 120 minutes per week, which is insufficient for my needs. Multiple attempts to contact their customer support get, at most, an automated reply, but nothing more than that. I understand that support can take a while, but when you get no response after a week or more, I'd say that the customer service is poor. I'm not sure whether they downgraded all AppSumo customers or there is just an issue with my account, but with no repsonse from customer service, there is no way to know for sure. It's too bad, as this is really an awesome product.