John,
I've been toying with ordering one from RV Upgrades for the past year. Although our stock head gives a nice shower, I do spent a lot of time soaking it in vinegar (usually at least twice in a season) to keep the mineral deposits from clogging up the spray holes.
Now that you've put yours in, & knowing how much several of the PP's like theirs, I'm even closer to ordering one. I need to check with the group to ask how the mineral deposit issue is with the Oxy head.
L-
P.S. I always check RVU 1st for items. I need Bill to add a "water thief" to his inventory to help me with those stripped & unthreaded spigots the OH state parks have at their fill stations.