Bought these strings for a student of mine.
She uses a Fender Shot Scale Jaguar, the 5250XL suits her bass very very well.
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.
I guess the lasted as much as any bass strings with normal everyday use.
Not the best but also not the worst strings on the market, for the price they are very good indeed