Customer service is superb. They are so very helpful and quick to respond. However, BEWARE. Just as with many of the other third party apps that offer FREE services, once you begin using their apps, get ready to get hit with monthly RECURRING fees. Let me share an example, I just clarified with the developer that if I sign up for the monthly back in stock alerts to have the ample amount of monthly alerts needed, would I continue to be charged on a monthly basis if I no longer needed the alerts. Meaning, I have no out of stock items in my shop and therefore would not need the back in stock alerts. They responded saying that I would be billed monthly regardless until I opted to switch back to the free plan. This is how they get you. I am currently looking for another option but it appears all third party apps behave this way and is extremely unappealing to me.