TOEFL, the SAT, ACT, GRE and those admissions tests are all ways to "weed out" the "bad." It's a purification device. That's what I think about it :P But as an entity in itself, studying for and taking TOEFL is a very good way to study and learn the conventions of English. But, if you decide to go off to an English-speaking country, you will see nobody really talks like they do on TOEFL.

i suggest you take it only if needed