I live in the Central New York region just east of the Finger Lakes. I work with people who live in the region and I road trip quite a bit in the area when the weather warms up, so I have a "mile-wide and an inch deep" knowledge of the area.
I consider this book a "lite" travel guide because it doesn't cover much of what's in the area, but it covers what it does in great depth. It focuses on what the cover says, and nothing more. It doesn't cover many eateries outside of the population centers, and skips a lot of the "hole in the wall" restaurants, diners, and stands that offer great food but are a bit off the beaten path.
If you want to focus on wineries and want some in depth knowledge about thoose wineries this is the book. Beyond that you will need to look elsewhere for information.