i have always loved Shark products. but this robot vacuum has been nothing but trouble from day one. constantly quits, I’m always having to restart it. Now it runs for 3 seconds and quits. I cannot make it work no matter what i do. I’m going to send it back to Shark. Hopefully they will give me a refund. if not i’m taking a hammer and smashing it to a million pieces and mailing them the parts.