4 phone interviews followed by an entire 8-5p day onsite for additional interviews, taken to lunch, more interviews in afternoon then left alone in a conference room for an hour with no wifi and only walls to stare at, then signed out. Everything was cordial and friendly but no offer or apology for wasting my time! Never experienced anything like it. Not sure what went wrong other than salary discussions weren't as close as they should have been for the qualifications required and performance expected.