I've had a 6x2 Smith's black ark since before I'd even thought about straights. I've always liked that stone.

I'd never flattened it and gave it a go a few months ago. Still have plenty of sic powder left. I wouldn't say I like it but no worse than hours of blade sanding. I'm sure I'll be learning it with razors when I've got the1/4/8K thing handled, though it might be a little small. Works great for my carving knives.

I also couldn't resist the 50% sale and have a Silkvein ordered. I've still got lots to learn before I tackle that one though.