Hey Mike, it sounds like your PPD-LTD etcher is geared towards modelers like the Excella site says they are. Since you already have experience with them, we don't need to Guinea Pig around.
Can you outline for us how the whole shebang went?
Example:
You drew up your artwork in XXX format with X colors, mirror image artwork with backside etch, emailed it to them, they quoted you $XXX for this, and $XXX for that, and it ended up costing $XXX for to many sheets sized XY, etc?
I want to know how the newbie, (me) gets started with etching services, and does it with minimal reworks, so I can get it right the first time.
Thanks,