I can't speak about customer support too much but they seem very quick in their response, and just to note, they're probably not in the U.S.A. However, it doesn't take away from their amazing work, top notched product, thats forsure. Couldn't recommend a better software than this for web performance, it was almost instant. I highly recommend, this product. It did not do anything wrong to my site, however, it did increase resources but I can't speak on this as I'm an data analyst and not a web developer.