I bought quite a few queens from her this year.
Excellent service
Ditto for communication
Ditto for delivery
I intentionally wanted some Carniolans, and have not been disappointed - hard working, very productive, very prolific, incredibly gentle, adjust size of brood nest according to flow & weather, very frugal with stores.
I have two hives in particular which are up & out before any of my others, and were still foraging in the pouring rain yesterday when all the others were tucked up under their duvets.
As for swarming, no problems at all: then again I have big hives, and keep working the brood nest in spring/summer. I wouldn't recommend for anyone on single National though.