I have been using the plexityhide gantt component since the VCL and ActiveX version. I chose this component after significant research on the net for a good and flexible gantt chart component. GTP.NET hands-down is the winner. It is elegantly designed and is amazingly flexible. The properties, methods and events are very intuitive and there is always a way to perform a task even if it's a very obscure one. There are adequate drawing shapes out of the box, however you can always add anything you want through Userdraw events. It is very fast in the redraws and this was a requirement for me, because I can potentially have thousands of timeitems. Support through email has always been timely and quite good. In short, I highly recommend this component to anybody who is need of a well performing, elegantly designed gantt chart like functionality. I believe that source code is additionally available to purchase which is a great risk management feature for any large corporation.