The best thing about rivalscan is its ability of finding up-to date information regarding technologies being used for building online sites. There isn't anything I dislike because it does exactly as explained in their website descriptions! Their services can be expensive but they do provide good customer service if there were any issues while using them (they have live chat feature). They offer multiple options like paid plans or free trial periods where clients receive full access without paying extra fees so i recommend trying it before buying an entire plan from rivalscan. We use rivalry scan mainly when doing market research projects which require us looking into how existing web applications work by comparing those apps against each other since not all software has similar functionality across different platforms and devices.