This thread is about the new Bluetooth bulbs. What model do you have?
As far as whether the older zigbee only bulbs “work like a charm,” They work just fine if you are also using the hue bridge.
However, if you connect them directly to a smartthings hub without using hue bridge, they can cause your other zigbee devices to lose messages. You won’t see any problem with the bulbs. You’ll just keep getting random off-line problems with your other zigbee devices. Or things will run slowly. See the following FAQ.
FAQ: Do I need the Hue Bridge/Hub to Use a Hue Bulb with SmartThings?