i'll tell you right now, the digitizers there are lazy pricks. they wont make anything look good if it's challenging.
i would make ANY text at least 4mm tall. make any lines at least 1mm thick (unless you just want it done in a running stitch - which is just stitching in a straight line, not back and forth or anything).
no matter what, it will never look exactly like your artwork - and 85% of the reason is the people that make the file to run on the embroidery machines are just plain awful.
if whoever is doing this needs help or anything (with graphics, files, new era or any of the process) just shoot me an email.
mfcharlesbeasley@gmail.com