https://www.tripadvisor.com/ShowUserReviews-g191277-d6417893-r372910902-Bangor_Carnegie_Library-Bangor_County_Down_Northern_Ireland.html#REVIEWS
These were some of the positive reviews I came across, a couple of them mentioned the wide book selection and the various facilities that they offer. Most of the reviews on the Bangor Library are positive which is always a good sign, the only bad review I had seen is shown below:
This is the only negative review I found to which it mentions nothing about the book selection or the library itself but just talks briefly about the lack of car park spacing which I did notice when I was there as the library is situated at the edge of Ward Park it is hard for cars to get in and out of there. Like the review mentioned parking is very important especially when trying to make the library accessible to all, this seems to be the only issue with the library and it is definitely something that they can work on!