Top critical review
Works, but pretty flimsy
Reviewed in the United States on August 16, 2017
Once installed it works fine. You get a lot of pipe for the $. Couple of things, though... I worry about the durability. It is not what I would describe as "robust" in any way. I bought several of these and one had a series of small holes in it, for no apparent reason, some kind of manufacturing defect I guess. Also, check your local big box home store as the price on this can sometimes be higher or lower (considerably) on Amazon.
Also, the end fittings can be kind of sketchy. I've found that some 4" fittings/connections work and some don't, and some work with the cut ends and some don't. I'm pretty mechanically inclined and I'll tell you I'm not impressed by this "system", but if all you're doing is hooking up a few downspouts or something then it's really not a big deal.