checking for unique-ness of article

what do you guys use to check?

i have copyscape premium, is that a good way to chk?

copyscape is a good way to check, if you are using spinners like TBS they also have their own checking module in there, but even with the article spinning software I still find copyscape to be the best way since it is a lot faster than the spinners, (they make provision for your copyscape api to check within the software)

I am using TBS right now and added my copyscape API, anyways, when I use the copyscape at TBS, it only shows me a list of webpages that are similar and the number of words that are matched, but it doesn't tell me the % match

copyscape user here, it get the job done 99% of the time