Advanced Robotics Group interview questions

Two phone interviews which were more like discussions than hard grilling of tech info plus one in person lunch. I was given an offer and accepted. I put in my 2 week notice at my current employer. Just 3 days before starting, this company sent me an email stating that the offer was rescinded. No explanation, would not answer texts, phone calls, or emails. Now, I see that the position has re-opened and I wanted to warn people that applying to and accepting a position here is very dangerous to your career. I now understand why giving 2 weeks notice isn't done as much any more. This cost me a great deal of money as I had to start the job hunt process over again with a gap in my work. Fortunately, everyone that I interviewed with had similar horror stories and told met that it meant that I had dodged a bullet.