What do you like best about the product?

Varnish is really fast and powerfull . The Varnish Configuration Langage (VCL) is a must (think embedding Javascript to configure the cache). You can do everything with it.

I use varnish for caching popular content (VOD, Live, Static Assets) on hundred of servers, but also for Load Balancing API. Varnish support also distributed and multi-level of caching.

I haven't found any problems in many years. The support is fast, and helpfull. The support come from the developper so it's very easy to find issue with our hardware.

What do you dislike about the product?

It's difficult to find a flaw for Varnish. Perhaps the cost of the solution ? But when i see the number of times i've open a ticket (3 in 8 years) I think the value is well spent.

What problems is the product solving and how is that benefiting you?

Varnish can serve without a flaw severall hundred tv channels, and thousand of VOD contents to our customers. Caching severall terabytes of content is not a easy task, varnish solve it with distribute caching and load-balancing between healthy node. Scaling is not a problem, we just need to increase the number of servers.