I will add my $.02 -

I use AP Circuits a lot, and have never had any real trouble.
I have used them several time for runs of 50 boards for small
production of a device.

EP circuits on the other hand is a little cheaper, but much less
quality.  Hole plating was OK on the one double side board I had
done, but several of the units had the solder mask skewed so far as
to be off the pad.  Some units were OK.
I tried them again for a single sided board.  The copper was really
plated heavy.  This tends to close up the holes.
Not worth the little money I saved.
Gary Skinner   gskinner@csd.net
Electronic Solutions, Inc.
design of custom electronic controls