Over the years I've found digital scales invaluable for reloading, but unless you're prepared to buy a $1000+ precision scale, you shouldn't rely on it solely for making match ammo (plinking ammo is another story). Electronic scales are very fast compared to beam scales, but they can be very fussy about warming up (most should be calibrated, run for 30 minutes, then calibrated again before using), very picky about environmental conditions (room lighting, air motion, etc), all resulting in drifting of weight values. Of course, if you're loading for speed and not accuracy, it's fine, but if being off by 1-2gr is a big problem for you, then you need a more redundant method of weighing.
Between 2007-2011 I had a pretty good system down for match ammo where I double-weighed powders on electronic scales - first powder is thrown from an electronic dispenser, then I confirm the weight with a second stand-alone scale. This was very fast and generally any drifting of either scale showed up rather quickly. That said, it wasn't until I started spending more on a higher quality scale to confirm loads that I actually got the consistency I was looking for.
The ironic thing now is that I no longer electrically dispense powder and instead do it the old fashioned way with Lee powder scoops. I scoop the powder onto an RCBS electronic scale, which gets me in the ball park very quickly (a good powder thrower is still a viable option for this), then I load it in my beam scale and use an Omega powder trickler to trickle the last few kernals of powder until I hit the weight.
So I guess the point I'm trying to make is electronic scales are very, very useful but I don't think it's wise to rely 100% on them for match ammo unless you're willing to spend the money for a top quality professional scale like a GD503. Otherwise, just build in some method to confirm the weight before you charge the case.