anyone done trenchless pipeing?

we are gonna change our main sewer pipe on our house and a contractor suggested us to use ‘trenchless pipeing’ wich is a new way of installing some kind of linear material to replace our old pipes, is this good? i would rather replace it with some new plastic pipes, but this guy seems to tell me its the new way of doing it without digging up our yard.
They use flexible polyethelene pipe and pull it through your existing pipe. Probably cheaper and easier but sounds more like a shortcut for the contractors. I dunno much about it though.