Hosted OS X Mountain Lion- your experience with different providers

varelg

I am looking into taking few of their exams, reasons vary (from private- dating an avid Mac user with aversion to tech to seeing independent Mac support techs actually being able to pay their bills from supporting Macs) but can't afford their hardware. So I am looking for a provider for a desktop OSX Mountain Lion installation in the cloud with reasonable pricing for the purpose of practicing for their exams.
I'd appreciate sharing your experience with various providers if you've been using this kind of installation...