Have a couple of these units, and it's brilliant imo, prefer it to the K&M system.
Use one of these for over a year now so i have turned a few thousand cases, the second one i got a few months back.
Most other offerings is a pain to use if your gonna hand hold them, a vise takes that out of the equation, but it does not benefit concentricity as your cutter will be solidly secured.
The Lathe lets the cases and cutter free float to self align and the design works well, the runout is minimal.
The case holder is fast to change cases on, and easy to switch around to different holders.
Adjustments i find easy on both, just turn the Micrometer wheel to the setting you want to achieve, the K&M is a bit faster to adjust.
Another brilliant thing about this unit is the cutters, with matched angle to your cases it will cut a correct relief into the shoulder, to help prevent donuts.
If you still somehow get donuts, or you have the K&M unit from before, you can buy the adapter and use K&M Mandrels for inside reaming.
I mostly shoot my 284 win, brass is made from 6,5-284 Lapua cases, a case known to get donuts when expanded. And i do not have problems with donuts as long as i expand and neck turn with a proper relief cut, on the 21 st century system every time.
I do have a tight neck .313 chamber though so it might help a bit.
Have one unit set up for my 284 win, and the other i use to skim turn the other calibers i reload for.
The only downside to this unit is really the price, as it gets expensive with shell holders, drivers and cutters for every caliber, but you get what you pay for.
Everything is very solid, nicely machined and of high quality.
I might be a bit biased as i use most of the 21 st century products made now, my old tools is mostly colecting dust.
If your looking into 21st century products, be sure to take a look at Johns Priming tool, certainly the best there is.
And i do look forward to get my Hydro bullet seater.