A tough competitor with the Editors' Choice-winning Platypus GravityWorks, the MSR AutoFlow is so similar to Platypus' model we had a hard time deciding between the two. Both products are gravity filters that can treat large quantities of water very quickly and are great for traveling in the backcountry with groups. The GravityWorks has an extra bag that allows for more water storage whereas the AutoFlow does not come with a second bag to store clean water in but rather needs to filter directly into a bottle or other separate vessel. This process saves a step but allows for less water carrying capacity. It now comes in a 2-liter version which could be a great choice for traveling solo or with a friend.
The updated 2017 MSR AutoFlow continues to be fierce competition with our Editors' Choice Award winner, the Platypus GravityWorks. They are both great gravity filters, but we find the GravityWorks slightly easier to use and more convenient in most situations than the AutoFlow. We applaud MSR's efforts to lighten up and reduce the size of the Autoflow's package but were disappointed they did away with the more durable bag material of the former model. The Autoflow is now two ounces lighter than the previous version and one ounce lighter than the GravityWorks.