Anyone ever seen this combo stone?

Kai AP-0305 - Sharpeners Combi Whetstone

Has anyone ever used this stone by ANY chance?

I am looking for a stone making life more fun and easy when restoring messed up ebayers. Till now for the 300 stuff I was using sandpaper, but it's getting expensive + it is no fun at all compared to a stone!

Does anyone know about this stone? Would you recommend it?

Thanks!

To remove pits from the middle of the blade you'll need some paper, but for edge restoration this is probably alright. With 1000 you may have a decent bevelsetter as well. :)

Kai makes Shun knives,
the stone could be rebranded naniwa or king etc.
I would think the stone will be decent.