Breezing Forms on the other hand is brilliant! A lot of features are automatic (like form contents being emailed to you on submit) and there are plenty of themes to allow you to customise the look.
Excellent documentation and how to videos if you get stuck, have yet to have any reason to contact their support, so can't comment on that.
You create an error page from within the component, then you create a menu item and link the menu to the error page from within the component (rather than say an article as you normally would). Don't publish the menu on any of your pages and set the menu in the rhs prefs for bots not to scan etc (you son't want Google crawling it). This seems to then publish whatever you have put in error page you created within the component into the main body field on your page.
I'm assuming this is how it works with the non commercial version as well, I upgraded to the commercial version in the hope that I would get some customer support (Qlue do not offer any support for the free version).
With a comprehensive how-to doc, this would be an outstanding product.
I use a few extensions from this developer and wished they made an extension for every single feature I needed, they are such a pleasure to deal with. If you need help with anything, post a forum message and you'll get answered promptly. I have required things tweaked a bit here or there and they are always ready for a solution.
It's developers like this that give Joomla such a great name.
There are no doubt much better looking and more functioning charts out there (there is a paid for version of this extension that looks very nice) but for a free chart that does the job with no coding knowledge requirements, this is perfect.