I’m using Lutron Caseta switches in outlets without a neutral and they work very well. You can have direct integration with SmartThings if you are willing to root a Wink hub. I ended up buying a Wink hub on amazon warehouse (for about $30) and using the “nand glitch” method to enable root.
Out of all the switches I’ve used the Lutron Caseta switches are rock solid, no buzzing during dimming and I’ve yet to find a LED at amazon/home depot that didn’t work.
More information on the Lutron Caseta integration is here: [BETA RELEASE] Lutron support in SmartThings using custom Wink Hub software - looking for testers / the adventurous.
I wish Smartthings would offer direct isupported integration with caseta.