I use them and have had 0 issues. Super easy to install just make sure you go slowly when submerging to ensure that no water gets trapped between the shaft and wrap
avant... you're talking about Quikfletch - he's askin' about Speedfletch. The Speedfletch is a one-piece molded fletching unit that you have to slide onto your arrow and then secure with superglue at each end of the vanes. I've never used them and don't really see myself doing that in the future... they're just not for me. I'll stick with the Quikfletch.
Ah yes sorry easy confusion! Yes I'd stick with quikfletch. More secure and less mass. Also glue is rough on the shaft so quik is easier to replace