R3 (and other monobaths) are so easy, cheap, and virtually instant

I was just playing with a Pentax 67 and the 105mm f2.4 lens the other day with some KODAK 400TX and tossed it in the R3 monobath for 10 minutes. Afterward it got washed in too-hot water, so it reticulated a bit.

What could be easier, and cheaper, than this? A digi? You get a 6X7 negative that takes 10 minutes (and costs about 50 cents). I would like those who are concerned about costs to show me their results with this process.