Simple to use, lightweight, with no ads or other distractions. The only thing I don't like about it is that the search doesn't work quite as well as in Google Chrome. But otherwise it's an excellent tool. If you're looking for something super lightweight, this is the way to go. There are lots of resources on caching issues and how different browsers deal with it. This is a good place to start if you need help figuring out your own implementation, or just want to see what some of the best practices are. We had used many different caches before, but the problems we faced were solved by using cacher.