I like how easy it was to use - just drag-and drop items into my project folder! Also liked being able to customize each item by clicking "More" next to its title bar; this allowed me to add more information than what's displayed at first glance when viewing an online tutorial or example code from Microsoft/Apple etc..
The only thing i disliked about Helpinator so far has been having trouble with some of their older tutorials which were written using earlier versions of HTMLhelp format instead of current version used today. There are many programs out there nowadays but none as user friendly nor reliable as helPinatOrr itself!! It really helped us reduce our time spent writing manuals & guides while improving quality too!