On that one, the lack of foot rests looks very uncomfortable.

My old ones were somewhat like this: http://www.officechairsforless.com/Square-Bar-Stool-ES25VS3....

Except sturdier, unpadded, and slightly tilted forward. They were also slightly pyramidal, resulting in a somewhat narrow seat but making the stool very stable.

P.S. Just found these: http://www.worthingtondirect.com/tables/solid_oak_stool_by_g... . The 30" one is probably closest functionally - I think one just has to slide off the seat to be standing up.