I'm glad to inform you that my first experience with SB has been success
I haven't had chance to try any roots though. I have bucket of roots dug up and waiting for me outside...so any time now I'm going to do little culinary 'adventure' and see how edible they are. Chickens were very happy with tops
My plan is to leave larger roots into ground and hopefully they will yield new lot of seeds later on.....
Growing itself wasn't anything different to beetroot...SB just need much wider spacing so both, thinning out and sowing very sparsely is necessary. I also made all the effort with ground preparation..and my roots truly has done well.