It's been a couple years, but what I remember is that I liked them, they were even across the board and the B string was good, but I wanted a bit more zing. My ideal setup on this bass is such that I could play something off of Pearl Jam's Ten album one minute, then flip switches and turn knobs and play Americana or something thumpy the next minute. The Dunlops didn't quite get me to the Pearl Jam tone, which is not a knock on them, they are true flats.
I went from them to the EB Cobalts, to the current GHS Pressure Wounds, looking for a string that straddles flat and round tone and isn't too hard on my board.
My only other experience with Flats is Chromes, which I had on a fretless Jazz years ago and didn't love, and DR Legends, which I have and love on my 'designated old school tone' bass, but I don't think they'd be what I'm looking for on the L-2500.