Product review (5 stars): Coupling works fine
Great coupling.  In my case though, the trans shaft was so ruined, that even grinding splines into it and epoxying this coupler onto it was only a temp fix.  But the coupler itself was totally fine.  If I needed another one, I'd buy this same unit.  Although after seeing the destruction of my trans shaft by the original coupling, I might consider the merits of a coupling without a metal insert.  The pic of this unit shows just plastic, but actually mine had a metal insert.