I have done some analysis on the company and the stock offering.
Given that Softbank retains a 90% controlling interest in the company, it would be a mistake to buy the stock at this point.
If Softbank sells off their stock so that the company is a real share holder owned company, then it might make sense to buy.
At this point the stock is probably worth about 10% of its IPO price, so I would wait a year or two to see how the company performs before I would consider buying it.