I used it during Summer 2 2014 in L/S 502 for vocabulary building for words from particular units, but it could be used for any class.
Here's how it works briefly. Teachers can go to the Cloze Test Creator website where they will get a text box and a separate box for features. For example, if I were working with a piece of text from a TED.com video transcript, I would copy the desired text from TED.com and paste it in the cloze test creator. Teachers have the option of choosing certain parts of speech or specific words/items they want. For example, if I were working with students on prepositions, I would select the "prepositions" button in the selector box on the right of the page. Then finally I click on "submit" and the close test is generated on a separate screen. Simply cut and paste the cloze test generated into Word and voila, close test is generated!