Real good price.
To me, the Fusion is the dumbed down version of the Mazda 6.
Same platform, same engine design, same transmission.
But being that your mom is going to be driving it, she probably won't miss the 6's Active-Matic gear selector. ( the Fusion has Park Reverse Neutral and Don't even think of selecting your own gear)
It's also doesn't handle as well, but it is quieter and smoother.
In my opinion, the Fusion is the best of the big 3's cars in that class and not just because my car shares it's platform and that price is less than what I paid for my 6 with about 20,000 miles on it 4 years ago by about $600