LinkedIn Manager interview questions

Applied to posting on my graduate school alumni job board. * Phone screen the next week. * They said they'd call me back in 3 weeks...didn't happen. * I then emailed and called several times. No response. I gave up. * Two more weeks later they contact me (I had thrown away all my notes by then!) * On-site interview the next week. They were 45 minutes late. The interviewer hadn't even read my resume. * Two days later they call saying they'd bring me back for 2nd round interviews. They'll call in two weeks to set it up. * Three weeks go by...no word. Several emails & calls from me + two more weeks...nothing. I'm giving up on them. Would I really want to work for people/place this inconsiderate, who repeatedly don't follow through with what they say they're going to do?

Met onsite twice for casual lunch with two different directors. Culture is relaxed but very energetic. Company culture values fun/humor and everyone seems like friends.