I've been using them since, at a guess, about 2010/11 - say about 400,000km (258k miles) on the two V7s. Good, & I average 20,000km (12,000 miles) on a rear tyre & 50,000km (30,000 miles) on a rear. Works well with tubes, tho' I don't know how convenient they'd be in tubeless - I can see them getting loose easily.
I started using them after getting a flat mid trip (farm country outside Adelaide; not a lot of passing traffic), changing the tube & carrying on - that tyre scrubbed out in less than 5,000km - seriously out of balance. I came across the Dyna beads & have used them ever since. Automatic balancing, no special tools, skill or judgement required. No worries about changing a tyre beside the road in the back of beyond. The spare tubes packed on long rides are usually already loaded, as well as a spare ounce in a vinyl tube in the tool bag next to the tyre levers, just in case.
Recommended. At least try them out & see if they work for you. Resupply (once, only recently) is very cheap - I bought the small pack & now have enough for the next millennium.