It all comes down to what you are looking for out of a glass pipe. Chillums usually have a smaller capacity for dry herb but lack any particular weak point in their design. This makes them comparatively durable to glass pipes with large bowls. Chillums are also more straightforward to use but often lack features like carb holes, which can help customize your smoking experience. Pick what is most important to you in a glass pipe, and that will guide you to chillums or a different style of pipe.