If they have what you need, it's indeed a great option. Many of them lend eBooks too, nowadays.
Unfortunately, living in a French speaking area, my local library network doesn't carry a lot of English material, so the selection is very limited. I've found it to be problematic especially for non-fiction, which often doesn't have translations available. Otherwise, libraries are great.
Teenage me would be ashamed to see I barely read any books anymore. I used to read two large novels a week, now it's more like one or two a year...