There's different levels to wso's (in general)...

1) I (actually) did it -- and was successful. (that's the level you're talking about, Gordon)
2) I see that others (including the wso's creator) have done it successfully -- and I believe them -- and I think it's repeatable.
3) The wso's creator has done it successfully, and I believe him/her -- and I think it's repeatable.

Personally, if a wso passes any or all of those, I deem it legit. (legit enough to try it and/or recommend it)

-- TW