Have you undergone the interview yet?
I too decided not to get a lawyer. It went fine. But it was not "easy" it was long, painful, and trivial to make an error (the paperwork is extremely poorly designed, we used online guides instead of the official instructions to avoid tons of gotchas, in particular with the financials).
People just need to be extremely careful without a lawyer. It isn't "easy" but it isn't so hard that you NEED a lawyer either (which could cost thousands).
I commented on this above, but it nearly happened to me, too. We picked an immigration attorney to look over our paperwork, just to make sure we didn't make any glaring mistakes. While we did get some good suggestions, they missed something pretty big that we found on both the official government documentation and a number of forums, and had decided not to go with their services anymore. Luckily we caught it prior to submission.
* A permanent residency application based on my marriage.
* An application to remove conditions on said permanent residency
* An expedited naturalization application
We didn't bother getting a lawyer: the paperwork was easy. The problem isn't that the paperwork is hard. The problem is that there is so much paperwork to file.