I love how easy it is to use, not least because of its documentation! The responsiveness in creating custom components has been great too - super quick turnaround times from requests (sometimes even quicker than we expected!). It's hard sometimes keeping up with where things are at in terms of development as they're always working towards new features but this hasn't really affected my experience so far since everything seems pretty well thought-out already anyway :). We've only just started using their library recently ourselves though which helps keep us informed about what direction everyone else wants to take projects heading into future releases before implementing them ourselfesl.