I bought my first set of Chromes for my Rickenbacker 4003 because I wanted to tame its overly aggressive Nordstrand pickups. I did so on the advice of several other TB-ers and I'm glad I listened to them. I was also curious about trying Chromes because I love D'Addario's Nickel Rounds.
I'm not normally a flats player, but the Chromes are very nice. They're smooth to the touch, not sticky (especially after cleaning them with rubbing alcohol before putting them on my bass), and they sound nice. They're still brighter than most flats, but they're slowly mellowing out over time.
Prior to Chromes, I've only ever had a set of Rotosound 77s and a set of La Bella Gold Flats. Neither of them can hold a candle to the Chromes. Both are way too stiff in standard tuning and in D Standard (my normal tuning). But the Chromes are a nice tension in D Standard. If you like your strings a little loose, you might want to try the gauge down. I was going to get the medium gauge (50-105) for D Standard, but I got the light gauge and it's just right.
I recommend getting Chromes if you want a nice set of flats. They're the best set that I've ever played (so far).