I would recommend those who have started mining not to order this expensive toy.
But still more expensive than just keeping/buying bitcoins.
I agree the fact that 330MH/s is not a lot of hashing power in hindsight and at the increased difficulty and its continuous rise (two times in a month), you might look at earnings of 0.008 for next month, 0.006..., earning per day and it won't be profitable. It has arrived late in the mining scenario but may give entry level miners a glimpse of what mining bitcoins is about thus making it more accessible to people with lower incomes thus having a far greater distributed hashing power, than relying on denser ASIC miners (e.g AVALON 60GH/s miner or the fabled "box with fans" that was downgraded from 1,500GH/s to 500GH/s).
Nevertheless, to be profitable, it should be at a much lower price if people want to profit in the long term.