It is very easy to configure varnish cache in our server with few lines of code. The configuration file can be edited from anywhere as it's stored online. There are many ways to use this software like we can set up rules which will trigger when certain conditions occur (like if request comes from specific IP address). We can also add parameters to make sure that particular rule gets executed only once per day/week etc. I have used it in my previous job but now i am using it at home where there is no need to pay any money for usage. So far so good. Nothing much to dislike about this product. If you're looking for something free then go ahead and try out this product. You won't regret doing so. In short, its an amazing tool available for free!! Easy to install and configure. No problems found yet.