A good 5 string is just as good ABOVE the 5th fret as it is below. Once you understand how to transpose the notes, the low B string becomes much more useful. If ya don't, then it's just 5 notes.
Agreed. I think the it's only five extra notes thing is why some people never really figure out how to utilize a five. You'd think they wouldn't even fret the B string above an Eb flat

. All of my low B's have the same number of notes as the rest of my strings. True story.
For instance, ever play a note on a lower position on a string and then play the same note on a
lower string at a higher position? The note being played on the lower string, while still the same pitch and octave, can typically sound thicker or more full... and many people never seem to figure that out. F# on the 7th fret of a B string can sound more full than on the second fret of the E string.
The other issue I've seen quite often with dissatisfied B string owners is that, no offence, they never actually learn how to control the string. Granted, this is something you
should learn to do with all of your strings but low B's tend to be even more problematic for many. I've played a ton of basses where the owner complained the B was floppy yet it wasn't floppy when I played it. IME it's playing an ideal over what you're actually holding. IME you can either play the bass in your hands or gripe about it. It's kind of like trying to force notes to be where you want on a fretless and complaining about the bass' intonation. The bass typically ain't the problem... but who wants to admit that?
And the thing I mentioned above about lower strings sounding fatter? You can minimize those differences with your touch. Or exploit them. That IMO is the cool thing about choices... but it does require shed time. I know that's not for everyone.
I got lucky... early on I got to see guys kill on basses that others declared subpar and those same basses sounded subpar in my hands. A quick logic check revealed the "problem". And I was willing to understand and admit that and it's been a boon to my growth as a musician.
No, I'm not saying everyone needs or should want a B string. I am saying that if you're going to give it a shot, give it a fair one. Try to understand how it works, put the time in, otherwise don't waste it in the first place. If the time spent complaining about B's had been spent on understanding them instead...
IME it's really not that hard to find a decent five string these days. It is however difficult for many to learn how to play one.
