Lots of threads on this if you search.
I’ve recently bought a pair of the am rims, they seem decent but I’ve not had them long enough to comment ontheir long term ability .
General gist seems to be that they’re fine as long as you have enough air in them to prevent the rim hitting rock directly. And in scenarios where an alloy rim might end up with a dent or something worse,these might crack or worse.
I reckon they’ll be fine, just need to run them with enough air in to prevent rim strikes,which is generally best practice for all rims