Customers have praised the staff at Books Upstairs for being knowledgeable, approachable, friendly, and helpful. They have described the staff as lovely and have appreciated their assistance, especially when it comes to ordering specific books or exchanging gifts.

Customers have described the atmosphere at Books Upstairs as lovely, cozy, warm, and fantastic. They have mentioned that the bookstore has a great ambiance and a wonderful café upstairs, making it a perfect place for book lovers to relax and enjoy a good read.

Books Upstairs offers a unique selection of children's books, including Irish children's books. They also have a café upstairs that serves tea, pastries, and coffee. Additionally, they sell second-hand books, tote bags, and have a great selection of literary genres that are not easily found elsewhere in Dublin.

Customers have highlighted Books Upstairs as one of the best bookstores in Dublin, praising its vast selection of books, cozy atmosphere, friendly staff, and unique offerings such as the café and second-hand book section. They have described it as a Dublin treasure and a great place for book lovers to visit.