Have its/their/your uses
Definition 1 of 1
Pro Tip 1/3Context Matters
Use when recognizing an object's or person's occasional usefulness despite drawbacks. 
Sure, this cheap umbrella breaks easily but it has its uses in a sudden downpour.
Pro Tip 2/3Not Always Positive
May imply something is not universally useful, having limited or specific effectiveness. 
This old truck guzzles gas, but it has its uses on the farm.
Pro Tip 3/3Subtle Praise
Can be a polite way to acknowledge the occasional usefulness of something not usually appreciated. 
My son's video games have their uses; they really do help him learn strategy.