I looked through a few gods that I didn't know. Some are done better than others. The ones that I did know well (specifically the Celtic pantheon)lack a lot of detail. The descriptions are a bit tongue and cheek, which is fine unless you are looking for some serious research. I think this website is great for an overview and to give ideas. It lets you find something and gives you a starting point for research.
Each god has a review box at the bottom: God, pantheon, what their portfolio is and other names or identities they might be associated with which is good.
There are different ways to search which is great for finding the information you need.