I recently purchased a Waterfly sling bag to test against my requirements. Despite meeting some criteria on paper, the bag disappoints in execution.
Structural Problems
The bag lacks rigidity, making it difficult to insert water bottles into side pockets. Without structural support, putting a water bottle in the pouch was nearly impossible.
Poor Feature Implementation
The iPad pocket accommodates only 11-inch models without protective cases — puzzling, since users typically protect their devices. The phone-access pocket positioned too high on the strap requires pulling the bag forward to access, which is ineffective for taller users.
Unnecessary Features
An exterior open pocket complicates access to the main compartment unnecessarily. Bag makers add features as a low-cost selling point, but functionally, they can be a negative.
Updated Requirements
After this experience, I refined my specifications to 13 prioritised requirements using the MoSCoW methodology:
- Single-handed phone access
- Quick main pocket accessibility
- Structural integrity for water bottle storage
- Affordable pricing under $100
The detailed analysis reveals a gap between marketed features and genuine usability.