I bought this saw recently. The table was flat and the fence was square. However, like most others, the bars that the saw head travels along are not parallel. I discovered this when I had a cut mark on a board and was lining the mark up with the laser line. As I pulled the saw head back towards me, I noticed that the laser line would move laterally relative to my pencil mark. The final cut was not square. I decided to just return the saw instead of trying to align the bars.
Hope this helps.
Jeff