I like them a lot, but they seem totally unpopular here, or unknown.
I tried them on a recommendation from another TBer. I love Ernie Ball guitar strings (an Army NCO recommended Super Slinky’s for guitar back in 1987!)
I tried their Group IV flats, and like those. Decided to finally try their rounds. Here is why I like them so far;
compared to D’addario, I find them to be very flexible. That seemed evident right out of the package, before I even put them on.
They seem to stay in tune very well.
whether you roll your tone knob all the way off, put it full up, or anywhere in between, I found that they have a good, even sound. Not too harsh, or too wooly down below.
they feel a little rough, but not like Rotosounds did back in the day.
On a side note concerning Ernie Ball rounds-I have a medium scale Squier Jaguar H bass. The only rounds that work for me, are the Ernie Ball medium scale Slinky’s. Despite being .045-.105 they are vey easy to play, flexible, with good, even tone all around.
Of course, this is all in my humble opinion and experience, but I wouldn’t be afraid to try the Ernie Ball stainless. You may like them, you may not, but personally, I’m planning to stick with them.