I had a ma957 and after i started having problems I saw someone post "if your first regulator is a Milwaukee then you will buy a second one soon"
I think the problems i had with mine were pretty unusual but if i could go back i would have spent more time researching and be more patient. I was too excited to start co2. I just bought the first one I learned about basically
I wasn't comfortable building my own or dyi in general. I'm really big on peace of mind is worth every penny. There are people on here who build them and I think that their expertise can be worth the extra money unless you are great with mechanical pieces. I'm not volunteering him but oldpunk recently sold me one that I am super happy with. I haven't been all the way to the end of a tank with it yet but everything else has been awesome.
So do yourself a favor and take the time to learn!!!