Carstens 3-Inch Heavy Duty 3-Ring Binder – Side Opening, Pool Blue, Durable Plastic, Precision No-Gap Rings, Waterproof Cover, No Pockets, Holds 400 US Letter Sheets, BPA-Free, Made in USA (1700-3R)

Customers find the binder durable, well-made, and appreciate its appearance and colors. The size receives mixed feedback - while some say it holds a good amount of pages, others find the size insufficient. The ease of use is also mixed, with customers noting it's hard for kids to open. The value for money gets mixed reviews, with some saying it's worth the money while others consider it terrible value.