Honestly they seem kinda useless to me. Today, they blocked a bridge which just fucked a bunch of normal people over. Everyone I talked to who was affected by it just said it pissed them off and they've now got less interest in XR.
Aside from that they're blocking construction of a high speed rail, and failing miserably. Bunch of builders have to deal with them playing their bongos and climbing trees by the construction site. Feels ineffective.
XR has a bunch of potential, since it is a widespread group of activists,.with an organizational structure built in, and directions from the top.
However, they are currently super libs, with directions to get arrested (listed in the system?), and organize useless events. It's not their fault, as they are just radlibs who have no understanding of what effective action would be. But their I know a few people involved in my city and they are genuinely smart, caring and concerned people, that could be convinced by real ideological strategy.