Tuya is a major hardware company. Their quality and reliability seem to be good.
(In fact, based on reviews, the reliability of devices used with their own gateway is somewhat better than SmartThings, but that’s typical of closed systems. The kind of versatility that SmartThings offers is always a challenge. But Tuya does use unique messaging, which is what can make it difficult to use their devices with other hubs.)
If you do want to try an Edge Driver with one or two devices to get more functionality in the ST app than the regular account-level integration, you will need to subscribe to the Edge driver, then reset the device so it no longer appears in the Smart Life app, then add it to the SmartThings hub and it should pick up the Edge Driver automatically. 
So if you want to use an Edge Driver for a Tuya Zigbee device, that device has to be directly connected to a SmartThings hub, and then the Smart Life app no longer knows it exists because it’s only a one way integration. So it just depends on which setup works better for you.
Here are some existing Edge drivers that work with some Moes devices, you can check to see if they already include your specific models. If you have any questions on those, just ask in those threads.
[ST Edge] Zigbee Driver for MOES 4-Button Scene Switch (TS004F)
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(NEW RELEASE) Version 5 of the Edge Beta Driver: Zigbee Switch Mc
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[ST Edge/Beta] Zigbee dimmer driver (supports MOES)
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If there’s a model number that doesn’t already have a driver, you can add a post here:
Post Requests for Edge Drivers Here (community-created)
Good luck!