I bought these strings for a Hofner Ignition Club bass guitar and they fit perfectly - not surprising, given the history and association between Pyramid and Hofner (there's an interesting leaflet included with the strings regarding this).
In short, these flatwound strings instantly evoked the sound of the 60s and 70s. Very thumpy on the E and A strings while retaining clarity on the D and G strings, so well balanced across each string.
I've had issues with short scale flatwound strings in the past in which they've sounded 'dead' or the tension in the lower strings mismatched to higher tension in the higher strings. The Pyramid Gold strings feel even across the strings.
Soloing the neck pickup on the club bass, these strings really stood out with a deep rich tone - very vintage sounding and comfortable under the fingers - some flatwounds can feel a little rough, but not the Pyramid Golds. Soloing the bridge pickup, I gained a more cutting tone, especially when played directly over the pickup, sometimes nuances between pickup selection isn't noticeable with some flatwound strings.
In summary, I would recommend these strings without hesitation - although a small detail, the dark green silk wraps around the ends of the strings look classy too! A nice alternative to LaBellas!