French drain system

Eager to know anyone's real-world experience with that NDS "EZ-Drain" stuff.

I hear it's no good for soils with clay and fine silt, and has real problems if you've got a high water table.

A lot of proprietary drain pipe 'advancements' eventually turn into unmitigated shite-shows. Examples include Orangeburg pipe, Infiltrator septic field lines, etc.

I'd approach any proprietary pipe product with caution.

Just dig a ditch.

We hired a company to dig out behind our retaining wall and put in a system like that with 2 catch basins and two runs of pipe. The issue is my neighbors property is higher ground than mine and alot of water comes off his driveway down my bank and was running over my retaining wall and flooding our yard. The pipe system didn't do shite. The water didn't find it's way into the pipes and nothing pushed it in the direction it should've went. The water went down further behind the wall and was pouring out of the bottom of the wall. I solved all that buy pulling out that crap system and poured me a concrete ditch running to the back of the property.

I use it all the time but only in certain situations. First question is what is the 125-150ft for? Is it collecting gutters, draining paving areas, draining a low spot, etc.?

Any flex pipe is garbage. Do it right with perforated pvc, and wrap it with geotex fabric. Corrugated is not durable long term, and will lift or sag as conditions change.