Probably been asked before, but if a poster has not met the criteria to warrant a critique and has posted a piece of work. How would one know when it is available to critique their work? I say this because I have annoyingly read through a few (some lengthy) works only find that the poster has not yet met the required criteria to get a critique.
check the post count on the left if it is low you can still make the critique (it will be counted towards the title), or wait 24 hours to see if it gets closed. Or click on the user name and take the see other posts by user option. That allows you to see if the reviews are constructive or not.