Windows 8 is so new no one is really going to be able to answer your question about reliability or compatibility quite yet. Windows 8 isn't even officially released yet.
Parallels already touts that it will run Windows 8. And because Parallels is a virtual environment, I would suspect that would be a safer route for exploring Windows 8 at this time.
For production or 'mission critical' use, I'd only recommend Windows 7 right now.
intend to purchase and install “ Microsoft windows “ using boot camp assistant , is it better to install “ Windows 7 “ or “ Windows 8 “ ?
Did anyone try Windows 8 on a Mac ? Which one is more reliable and compatible ?
Windows 8 is only beta, but can be run in VirtualBox
Only Windows 7 is supported by Apple in Bootcamp at this time, however you can install Windows 8 Beta into virtual machine software.