The best thing about them is the ease of use. You get some data and you start analyzing it immediately. You can see how your site traffic changed over the past weeks. They offer great integrations and nice visualizations. One feature that I find really useful is that you can easily create complex queries. For example, if you want to see which users viewed a specific page during a certain period of time. Or, if you want to see who visited a particular link after signing up. You can even go beyond the standard search engine optimization (SEO) queries and analyze what links people clicked on or didn't click on. This way you can understand which products are most interesting to your target group and prioritize the offers accordingly. Apart from this, they're offering an excellent training course and very helpful support.