When evaluating dot grid notebooks, the most critical factor is paper weight (GSM). For professional use, a minimum of 100-120 GSM is recommended to prevent ink ghosting and bleeding. The binding method is equally important; Smyth-sewn binding is preferred as it allows the notebook to lay flat (180 degrees), which is essential for designers and bullet journalers. Additionally, verify the dot spacing accuracy, typically 5mm, and ensure the ink opacity of the dots is subtle enough not to interfere with scanning or photocopying.