Corrugated is so easy to use, and cheap too. easily bends around
obstructions

but its junk quality wise....

They now have schedule 40 FLEXIBLE pvc drainpipe available in rolls.
has smooth inner surface unlike corrugated pipe so clogging isnt a
issue. pricey but easy to use, next time its all I will install

I stumbled onto it looking for something else, its flexible because the
outside is corrugated.