I had a break angle issue with a brutally shaved down saddle so these were reasonably cheap and available in the UK, so thought what the heck.
Vid of the shop owner using them is here:
They work okay, but you need to double tie them or they'll slip. I managed to trash a 4th string through lost outer layer by not heeding this advice.
Easy to string and holes are big enough to go through twice for a double tie.
Possible gotcha I could see would be if holes on rear of bridge were any lower on my guitar, the beads wouldn't sit flush with top of guitar - on mine they -just- sit flush if I spin the string round so it isn't below the bead.
They're a bit bigger than some of the other brands so you will see them - the styling is, um, quirky and not for everyone.
You do get seven in a packet so butter-fingered types like me who lose stuff by dropping are covered.
Not going to claim any noticeable change in sound. Break angle is much better, so any improvement is because of that. A your-milege-may-vary call.
If these are the bridge beads made from bone, I used them for a couple of years and while they worked, there were three issues with them that bothered me. The first was one that might cause a serious ding on an expensive guitar (mine are not). I had three of them crack with the resulting pieces and strings flying every which way. The second is their mass and bulk. There are now stronger, lighter and lower profile alternatives available. The final concern is purely aesthetic. I find them unattractive. Again there are more attractive alternatives. On the plus side, they do what they are intended to do.
Yeah - fully agree on the appearance - it is a bit blingy. The Rosette ones are lot more subdued but cost a bit more. I bought these mainly because they look least fiddly to use and were cheapest option I could find here in UK.