Played my first glow round last night in preparation for a glow tourney this weekend. I pretty much wound up throwing glow Pekapeka/Kotuku/Piwakawaka off all but 3 of the tees (and could've used them there if not for wanting to give the other glow discs in my bag a chance)
The glow seems pretty decent, I noticed the Piwaka was brightest, and Pekapeka least bright, although all of the RPM discs glowed well enough to see the full flight and have an idea where they landed, They also seemed to charge/regain glow the quickest out of anything in my bag, especially helpful if you're looking for them, a quick scan with your UV light and they're immediately visible.
Other discs in my glow bag for comparison included: sexton firebird, glow md3, color glow mako3, moonshine judge, mvp reactor, mvp envy. The RPM out performed everything except the MVP stuff which isn't even in the same ballpark, the MVP discs look like they have LED lights on them while flying through the air, and 2 holes later they're still giving off light in the bag shining through the other discs.
Also, last night was my first time throwing the Piwakawaka and man, it's a fun disc. like a baby Pekapeka (or at least I imagine the pekapeka would shape the same lines once it's more beat in or for a faster arm than mine) If I had to play a 4 disc round, I'd go with my usual putter, and the Peka/Piwak/Kotuku combo. The RPM stuff really seems to do a good job of still making the same line shapes at different power levels compared to some of the other discs in my bag