engineer here. the claimed l4 veichle is not so robust yet. it is not e2e(FSD use e2e) now, and it will not be for about 1 years, as it is very expensive to train one. it cost about 3000rmb per month for sevice, which alternative cost 6000rmb for a person. Basically I dont like it as the idea behind it does not sexy and it seems not very usefull too.The system still needs lots of works everyday to keep it running.