I cannot violate NDA, but will tell you that the majority of the information posted in these last three posts (price, availability, E50, E90 specs) are inaccurate.
Suppositions from dealers, show visitors, and in at least one case, Yuneec CS have been made that aren't correct.
Rumors (so far) about what will work and what won't work, what will be shipped and when; take it with a grain of salt. Any information from anyone but the Product Management and Marketing teams at Yuneec is likely to be off-target.
Yuneec Ltd will announce everything clearly when all components are ready, and most everyone here will likely be very excited about the specs, pricing, and offerings!
Meanwhile, here is a teaser photo of the 520, designed entirely for the Commercial/Enterprise market. This aircraft is not built with the typical Hobby/fun users in mind, although they'll enjoy it too, just without the hobby-oriented bells/whistles.