I set up several bait hives this year, some with pheromone lures and some
without.  The only success was without, but with smelly old brood comb.  Most
years I get a stray swarm in the stack of supers in my shed.  My view is that
the pheromone lures are in their infancy.  Try them from time to time but
compare their performance with old comb.  They may get a better formula
eventually but at present there seems to be a missing ingredient.
Chris Slade