Downloaded today and been playing around with Flux for a couple of hours.
A promising start, but the interface and way of working (although fairly easy to understand) is fairly unique, as is the way of displaying the site 'internals' (a sort of CSS-structured mind map!)

This is a beta version and there are some glitches, both in the generated code (W3C Validation and BBEdit shows up quite a few errors, most of which are simple XHTML syntax issues) and in the application itself (Preferences>select browser for preview caused 95% CPU to be chewed on!) Some unexpected quits here and there; and for this kind of application, fairly sluggish responses to what seem to be fairly simple functions.
Would also hope to see more templates supplied with the application.

The drag and drop capablilites of Flux are extremely useful and makes the application very exciting to use.
The supplied templates are modern, stunning and very usable.

All in all a promising start and this is an application I will be keeping an eye on. If the glitches can be sorted out I can certainly see myself making a purchase soon (hence the recommendation!)

aoi