Despite there were some problems, before 1979, life in Iran was good and it was, also, very important shape of secularism in Iran.
Although there was a dark point: the literacy in Iran was not good enough, very low, however Iranians were free to travel and there was no restriction against Iranians with different faith than Shia Islam.
However, comparing to poverty level, the Shah seemed failed to reduce poverty level. It was very high comparing to standard and thus, this was why the revolution happened. Another reason was the totalitarian rule of the Shah led Iranians into a very strict problems.