almost perfect
I’m 6’2″ and would prefer a 20′ pole, but 4′ doesn’t kill my back; I have the Unger “soft” brush that is softer-than-feathers-soft, so there’s no point in trying to put force behind it; it’s a rinse and near-polishing brush with squeegee; rather than leaning in on it you actually lean back a bit to keep the weight of the hose off the brush.
I haven’t had any problems with the valve nor threads, but I rarely shut off the water. If you want to tickle your gelcoat, this pair can’t be beat.