It's awkward. It should probably be closer to 30-36" from counter edge to flooring transition. If you haven't posted your plan here, please do.

It wouldn't bother me as long as they're on the same level

That's what we are going to have. Originally, the edge of the island overhang was going to line up with the transition from tile to hardwood, but we pushed it back a foot into the kitchen. The stools will still be half and half when someone is seated, but we are doing backless stools so that they can be pushed right under when not in use.

If they're at the same level with no raised transition, it should be OK. It may look "off", but it will probably function OK.

However, if they're at different floor heights or you have a raised transition b/w the two floors, it may be a safety issue. Stools bumping up against a higher floor level or falling down onto a lower floor level may cause the stool to tip or cause the person seated there to be jolted and possibly twist/pull a muscle.

Would you consider continuing the wood floors throughout the kitchen?

buehl: no transition. Will be 100% smooth, that is a must and understood by my contractor :)

Suzy: it was the original plan but in reality, with the way we use the kitchen, tile is most practical and long term solution. I like my floors to stay "pristine" as much as possible