All valid concerns and I can't blame you for having a jaundiced view of schedule projections issued by the company, given their past record. But at the current miniscule share price and relatively low volume of trades, it's imprudent to sell any large position. Is it worth buying? I think so, but it depends on your risk tolerance and patience.
Guess we'll have to hear what Stephen has to say, especially in response to hopefully some tough questions during Q & A.