Siloam June Bug is a tidy grower here. Flowers bloom just above the foliage. Clumps that have been in the same spot for years continue to flower well and are not aggressive at all. I haven't noticed rebloom. The medium yellow flower with well-defined dark red eye seems more like the color claims of 'Black Eyed Stella' than the namesake, which looks fulvous in sunlight.
It is somewhat prone to spring sickness here, as in
@sooby 's garden, but it's not the worst, by far.
No rust over-winters here, so not a problem.
To be honest if I didn't have a lot of space I probably wouldn't grow it. Some garden visitors have bought it because they like the name.
We just obtained Mayor of Munchkinland this spring. After a couple of years testing, it might supplant it.