I can't understand

I'm reading this article "On the hardness of optimization in power law graphs", and can't understand a phrase in there, I know all the words, but?! The phrase is:

"... .While the above model is potentially less accurate than the detailed modeling approach of the second second type, it has the advantage ob begin robust and general. " I think that I get the idea of what they try to say but I wiil change less accurate for another terms.