Alfalfa -Before or after bloom

When i was a kid we had close family friends that had over 300 acres in alfalfa, which i helped bale quite a bit. As soon as they saw the first blooms wed run out and cut it. Ive read a bunch recently that its better to let it all bloom and then mow it for the first cutting. How do ya'all do it?

Alfalfa -Before or after bloom