Power Nozzle
I am not in love with the Sirena Power nozzle. I don't like the adjustments that aren't marked. I wish it had a headlight. It appears to clean ok, but doesn't adjust down enough to clean the low pile indoor/outdoor type carpet.
Not bashing the machine, I use it quite frequently, and like it's performance, jut trying to be honest on it's con column.
I don't have a newer Rainbow, Mine is a D2 from 1976. The Rainbow I have has metal clips on the hose. I wanted a new Rainbow but my checkbook told me no. The Sirena is a good substitute on a budget.