"the great time waster"
I am very unhappy with this control...
First off, The home page claims IE 5+ compatibility. Up until sp2, which was released a few days ago, it would not work with anything but IE 6. I am loathe to test it, because the control now requires a dll to be placed into windows/system (!) which is unheard of for .net deployments. Bye-bye x-copy deployment, bye-bye hosted environments.
The real meat of my argument comes as this control is not Macintosh or Linux compatible. It simply fails when anything but internet explorer on a PC is used. It refuses to degrade to lower level DOM browsers like other asp.net controls. I recently had to painstakingly re-code an application to remove this control because of the small external Mac population that could not use this control... IE 5.2.3, safari, NS 7.1, Mozilla... doesn't matter... they all fail on the Mac.
So, this control has no place on a public web page, as you never know what technology a customer may still use. And, the intranet model for cross-platform deployment fails, as this control does not work on a Mac or a Linux browser platform.
All in all, the functionality this control provides is nice. I like the look and workings of it. I don't like having to email Malaysia (from the U.S.) and wait for days for a response. I don't like their proprietary "developer's network" which has no search features and is incredibly slow.
My recommendation... come back in a year and check out webcombo.net. If you have a project deadline, run, run away.