Bought these strings for a student of mine.
She uses a Fender Shot Scale Jaguar, the 5250XL suits her bass very very well.
Sound:
The 5250XL gives the bass a good round and the big sound. Maybe a little bit too much, these are not sthe strings if you are into slap, i'd put these strings on the pop/rock side.
Durability:
I guess the lasted as much as any bass strings with normal everyday use.
Conclusion:
Not the best but also not the worst strings on the market, for the price they are very good indeed