Very happy with these after trying several other makes. among the cheapest I have tried, but they have proved to be better in sound and feel to the others. My Bassix semi-acoustic double bass has proved tricky to install strings on - other sets would unravel when tuning up, (due partly to the bridge design on my particular one-off model). The Pyramid set, however were easy to install and tune up - and have held their tuning ever since. I only play with fingers so cannot comment on arco, but for my attempts at jazz style playing they feel great under the fingers and sound perfect - warm and woody with just enough thud'. Thomann cannot be faulted for packaging and delivery (to the UK in this instance).