NYC agreement is best and final. In 30 days this will be over without any chain split or problems. 100% smooth transition is planned. UASF will not happen.

It is not the best but maybe the final. I suspects there will be problems. For too long the "civil war" has caused many splits among developers, splits among users, too much personal egos involved, bitter infighting. I, also believe it will continue as long as Core tries to force Bitcoin to become something inferior to peer to peer payment method.
Do not expect anything smooth.