I have the Jaxjox smart dumbbells. They're great dumbbells, 8-50 lbs. It's easy and quick to change between the different weights. I'm not the biggest fan that it's digitally adjustable, I feel like more can go wrong. I also don't love that I have to charge the dumbbells (which is a weird thing to say). To be fair, I'm not really using any of the smart features of the dumbbells since I'm not paying for the membership.
I wish I could change the weights via Siri or another smart assistant.