I got these for a 4-string that I keep tuned ADGC. The string gauges in the pack are effectively the bottom 4 strings of a 5-string set, so I figured they were worth a try. I normally use Elixirs on my main bass, but that brand don't offer 4-string sets in my preferred gauge and I haven't found their strings for sale individually, so I'm experimenting. I've tested two sets of these on the same bass now in live and studio settings.
Well, they are certainly boomy, so the name isn't misleading! Quality of the strings feel decent for sure, but I just found they lack the clarity and longevity of other strings I have used unfortunately. Even compared to other nickel-plated steel strings there's no shine off them at all. If they have stainless steel versions I think I'd get excited. That said, my use might be atypical, and the strings might perform better tuned to BEAD - and as with all strings your mileage may vary based on your playing technique and bass or other gear.
I didn't want to rate too poorly - they are definitely not terrible strings, but my journey to find the best strings for my setup continues.