I don't particularly love cauliflower as a veggie, but the mashed cauliflower is delicious and tastes like a puree you would find in a fine restaurant. I am now using it as a side at least one night a week.
I didn't use the frozen florets she recommended, but as I had a fresh head, I just steamed it until very soft so there wasn't any problems with it getting waterlogged. I HAVE, however, begun to suspect that I need a larger food processor....