This seems much more like a forced IPO to get someone cashed out than the typical IPO to raise funds.
One thing to remember if you are investing, is that there will almost certainly be no restrictions on selling stock, meaning that employee's, C-level execs and early investors won't have the typical lock up period.
And since they aren't using an underwriter, there is no back stop for the shares sliding on the first day of trading.
This doesn't do a whole lot to inspire confidence in the company, Look for the CEO to make an announcement that they will be holding their shares, or be prepared to buy into a company while the people on the inside are getting out of.
As a user, I'm really excited for them, as an investor not so much. Hopefully they'll release some good news leading up to their IPO which could be as early as March.