I've never had to trim a case, never changed a barrel because it it was at the end of its life and there is nothing to do to the brass other than running it through a neck die before loading.
It's a great round and different. The same reason people AI cases, to be different and gain a little. I couldnt be bothered with a AI case and fireforming.
Who cases that it burns 10g more powder than a 250, thats only a reason for people to complain because they are tight arses, no other reason behind it. If you cant afford powder I think you need to take up knitting.
When I got my first one there were only a hand full around, now there are several and everyone that has one or used one loves it. Its only the people that dont have one that look for reasons why its no good.
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