I have a Babylock serger and it is quality made at it's best! I wouldn't have any other of serger. I also have a Janome 6600 that is a workhorse and is very, very heavy. I can't imagine it being made of plastic inside, as the outside is all heavy metal. I also have small, cheaper brothers and to be honest, they just don't suit my style. To me they are just not up to the standard of the Babylocks, Janomes, Berninas, Juki's. But again, this is just my opinion. I've only purchased the cheaper end Brothers (under $400) & I don't use them very much....