It's a pet project that he's giving away for free... I say let him have his fun. Do you think the aim is to inspire confidence in the user (or do you think it should be)? Remeber: he's not asking anyone to open their wallets; frankly I think fewer guarantees are better (see the "no guarantee this software will do anything" disclaimers on many FOSS projects). If people want more sober language and "professionalism," let them go pay for it- might be better that they look elsewhere. :)