I bounce back and forth between Arsenal and NOE, based on which one has what I am looking for.
I love my NOE moulds. Never had a problem with them that I recall and they work wonderfully. The value, when comparing to commercial offerings is astounding. I won't bother listing pros and cons, because it's all pros, except I can't always get what I want when I want it. Rock-solid quality, value and service. I would love to be able to pick a NOE mould and order it, but Al knows his own business and runs it accordingly. Doesn't always work out for me personally, but if it's working for him, it's working for the majority of us.
I love my Arsenal moulds. I've had one problem with one mould, which I'd bet money was a program "thing." Something got reversed or mirrored that shouldn't have. It was not a workmanship or material issue. Jared corrected the issue quickly by replacing the blocks. Treated me like he knew me. As far as pros and cons, I'd say Arsenal gets an extra pro for being able to send me what I want, when I want it, and I can specify a minimum diameter for existing designs.
I won't count the one problem mould from Arsenal against Jared, because I was treated fairly and it was corrected quickly. I'm absolutely certain that Al would have done right by me too, but, to be fair, he's one up on Jared, as I haven't gotten a problem mould from Al. Maybe something to that or maybe luck, I don't know, but I look to those two guys first, unless some super-ridiculous deal pops up on a 6C Lee, like happened a month or so ago. I have an equal number of NOE and Arsenal moulds,... last time I looked.