I like the tracers a lot. I've been meaning to do that as my eyes start to age. My favorite red feather pattern doesn't show up as well any more for me when shooting in and out of the shade. I often lose sight of the arrow in flight.
A couple years ago that had me tentatively looking around for almost an hour for a bloodtrail, on an elk dead less than 60 yards away, because I wasn't sure right where I'd hit her.
Only thing I'm worried about is their durability and what happens when it rains.