The most useful thing I like about this toolset was that it's easy for me as an amateur user in GIS field to use these tools with little training or knowledge of programming languages.
Sometimes there are bugs but they get fixed quickly by their support team who do really good job at responding very fast and helping you out when needed. It would be great if we can have more options using different algorithms instead just one option which sometimes doesn't give us what exactly we need from them. We used LAStools because our clients were looking forward to having something unique than other similar products available in market so far.