Milwaukee or Gen-X regulator

[TCU Reefer]

I ordered a Geo calcium reactor through Phishy Business and the sell all the components necessary for the Ca reactor. They give a choice between a Milwaukee and Gen-X. I've been noticing that some people have had trouble with the Milwaukee and I need your opinion. They are sending this out to me on Monday and as of right now, I've chosen the Milwaukee. Any experiences, good and bad, with these particular regulators?

Should I change my order?

Thanks