i'll say trust these guys on anythign they say. they know their stuff. i've been dealing with them since i started. it helps that they're about 10 minutes away from my house. but their customer service is awesome. and if they have your stencil design already, they can make stencils by the next day.
their set up fee is tiny and the price for a sheet of stencils (between 4 and 6 per sheet i think) is outrageously cheap.
they make high end production stencils for companies marking thousands of knives.
eric told me a story of one company having to push out thousands of knives on their last stencil, and the stencil looked beat but the first knife etched and the last were just as clean and crisp as could be.
in short. customer service is a+ product is a+
the marking felt is nice. about twice as thick as normal felt, holds plenty of electrolyte for marking a few blades in a row