I've used low-cost digital scales for the last several years, including the Frankford Arsenal DS-750, Lyman Pocket Touch 1500, and the National Metallic Digital Scale. I became accustomed to behavior of the FA and used it for a few years followed by the purchase of the Lyman as a back-up, which is very similar in operation to the FA. Another year later I purchased the National Metallic and have used it ever since, even buying a second one. The NM has a larger base and comes with an AC adapter which I much prefer to the battery powered FA and Lyman.
These low cost scales seem to have some sort of anti-drift/auto zero algorithms that must be dealt with in operation. You must keep an eye on the zero with the pan on the scale, and an eye on the weight (negative) of the scale when the pan is off of the scale. Readings must remain consistent, and a re-zeroing is often needed as those values tend to drift.
Those algorithms also interfere with powder trickling. I've found it necessary to trickle into the pan with the pan off of the scale, which is much less convenient. Otherwise, the algorithms will offset the trickling action, changing the zero instead of updating the scale reading in response to the trickled powder. I don't do much loading that requires trickling, but this issue could be a frustrating deal-breaker for those who regularly trickle powder.
In short, the low-cost digital scales have behaviors that need to be understood and accomodated to successfully use them. I've adopted to them and have zero interest in reverting back to mechanical scales (which are great for those who prefer them).
I have zero experience with the more expensive digital scales, or the systems that both dispense and weigh powder.