I like how easy it was for me as an administrator, or even just one person who knows nothing about coding (like myself),to be able understand what this software does so easily! Also i love all my reports which are very helpful when trying figure out trends within our site's traffic sources/sinks etc.. There isn't anything really bad at least from where we're coming into using us split but if there were any issues would have been addressed by now since they've had such great support thus far!! We use Us Split mainly because its simple enough yet powerful once used properly - plus their customer service has always made things easier than expected whenever needed too.