I've got a lower-end model, second-hand, still not cheap, but it's so cool.
You get real wire-o binding (not spiral binding!), so your book lays open flat on the table and the pages are right next to each other, not slightly displaced vertically like with spiral binding.
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If you print technical documents often, I highly recommend a wire-binding machine like this one: https://www.renz-germany.de/produkte/renz-ring-wire/eco-s-36...
I've got a lower-end model, second-hand, still not cheap, but it's so cool.
You get real wire-o binding (not spiral binding!), so your book lays open flat on the table and the pages are right next to each other, not slightly displaced vertically like with spiral binding.