Saint-Gobain Project Manager interview questions

My initial interaction was with HR executive and later with Engineering Manager. I attended two rounds of interview; one technical & onther personality test / HR interview. It was very well conducted in a professional manner. They paid me to/fro travel fair within the city. I was offered Lunch as it was lunch time. People are highly prefessional. nice office, it looks like a resort they have a open culture.

Phone screen with HR, One-on-one interview with the hiring manager, followup interview with a panel of people from marketing. I went through this process, they said they would get back to me in a few days, but they took a month to get back to me. When they did get back to me, the offer was too low. I was VERY disappointed that they didn't bring up their extremely limited salary range earlier. They knew my salary history and expectations. This and their unprofessional lack of followup made it a negative experience overall, I felt like they were wasting my time.