Back around 2000-2001 I removed 1 very large (24" diameter x 50 ft tall) 1 large (18-20" diameter x 40+ feet tall) and 2 smaller ones (1 foot diameter max x 30 ft tall) from the front part & south sides of the property.Nasty stuff,I burned most of the wood after a year or so,it kinda stinks,and leaves more ash behind than any wood I've ever burned before..About a 1/3rd of the wood I hauled out to parent's acreage 50 miles west,dumped it in a pile & left it to rot.......It was 2005 or so before I stopped seeing any of those sprouts around the stumps (kept them chopped off with hatchet) or growing in the grass several feet from the stumps (eventually they died too with normal mowing)
Absolute worthless tree,the flowers/immature twigs STINK,the trees are quite weak & brittle during most any storm,the wood burns hot but very fast,leaves a ridiculous amount of fluffy ash,not a very fine powder almost nothing like the denser woods.The roots will quickly & easily clog storm & sewer lines as well,plus do damage to your house foundation if they're too close (just like any tree with age unfortunately)
I suppose its only ''good'' qualities are the wood is quite easy to split (looks like most Ashes in color,grain pattern & texture) they do provide quick shade in certain urban areas that's difficult for any trees to survive. Luckily after getting rid of those,I havent seen any of them return to the property,even a few mid sized ones that grew a few blocks south down the street in a right of way next to Interstate off ramp were removed also I've noticed.Word is finally getting out what a real PITA they can be....
To give an idea how how much I loath the stuff - its the ONLY wood I will knowingly leave behind or not bring home from a free Craigslist or FB Marketplace scrounge.....I'll bring home Cottonwood (only a couple times in past 10 yrs when I was low on kindling/fire starting material) or White Pine/Spruce (one I actively seek out for such uses actually,its great for a quick hot fire in Spring/Fall) but If I recognize Ailanthus in the listing's photo from its bark or similar features,that crap stays put.Its not worth my time,effort or aggravation....lol