Yesterday I submitted a dual layer PCB to AISLER after having created an account and a set of
Gerber/Drill files according the the required naming/precision standard.
The job was accepted. Pricing was competitive and ordering process went smooth.
However: Many other board fabricators have moved to accept Gerbers in metric formats long time ago.
I have not designed using inch- or mill- for 15 years or even more. But AISLER accepted only Gerbers
in Inch, 2.4 format.
But having a european manufacturer who also cares for small/hobby customers is invaluable!