We use ours to cast powder loads for .223 (currently 25 gr Varget) and .357 (16 gr Li'l Gun). All those electronic scales / loaders are rated for 0.1 gr accuracy - the scale only measures down to 0.1 gr increments, or at least, that's all the read-out shows.
"They" recommend getting a couple of stout soda straws, and sticking the cut-off end of one up the exit chute; makes 'em less prone to spit-out globs of powder. I did this from the first with mine, so I don't know how necessary it was - but every so often, the dispenser runs-over ~0.3 gr; when it does, that load goes back in the hopper and I wait for the machine to dump another one. Probably every 20 rounds or so; no big deal, not a major pain, and just like everything else in reloading, you gotta watch what it's doing; I do that anyway.
We bought it because the charge thrower on the Hornady LnL AP does not like rod powders - a granule gets stuck in the gap while the powder bar is rotating. I have this problem with powders as fine as VV N310; it isn't affected by Win 231, and it routinely cuts individual granules of Trail Boss, but Varget granules are big enough to "stop the presses" - and since you're working the charge thrower by pushing the mouth of the case up it, it'll damage the case when this happens. And, wondering "What the...?" everytime this happened, I started weighing the charges it was throwing; and I wasn't very happy, a 0.3 gr variation was normal, and they'd go bigger.
Both our .223's are bolts - if I wanted to reload for a hungry AR, I'd go with a flattened-ball powder that the LnL charge thrower could work with so I could crank reloads through the LnL by the dozen, but finding powder down here is AWFUL and having 2 lb of Varget (and shooting my first-ever sub-MOA group with it), I was gonna' use-up that Varget, so help me - and having an excuse I could zing-past her for new reloading kit, I wasn't gonna' pass it up! Helps I reload for hers, too. As well, it gets her in the game - she runs the charges, fills the cases and hands 'em to me, I put bullets on the cases and run 'em through the Press.
We do the same thing with Li'l Gun for .357; we only reload ~100 or so of them a year anyways, and our dies are bad - old Lee carbides, the sizer die shaves the brass, and I couldn't bother replacing it for 100 rds a year - so we assemble them in steps, throwing the charges with the RCBS. Beats resetting the LnL to make 100-or-so .357's when my .45 boxes are empty, again, as usual; do-up 50 .357's with the powder charges thrown by the RCBS, and then go back to loading .45's.
And again, she works the RCBS - and she just bought her very own .357. We do a 'Ladies' Night Out' at the club every quarter-or-so, and the last one we did, I made a point for our female guests by having her shoot a cylinder-full of hot .357 magnums (small wife, big revolver, LOUD ammo); guess she liked it!
