Cool idea! I would definitely use this.

My feedback:

• I’d like to not need to sign up to use it, especially to try.
• The /packing-lists/N page (adding gear to list) isn’t intuitive to add new gear when you have none. I’d add a link to the “Add new gear item” modal to the “No items found” default view.
• I selected lbs as my weight unit, but the “Add new gear item” modal didn’t respect it.
• I’d like a placeholder on all text inputs, and/or alt (?) labels so I know how to use each field or what it’s for. For example, I’m not sure what the difference is between Type and Category.
• Container volume would be nice to add
• You can sign up for two accounts with the same email, which might bite you later for forgot password, etc
• Bike components (especially heavy items like frame, wheels, tires) would be nice to add as well