They do what they promise
They do what they promise, but dont expect this will be cheap. They charge fees for everything, once every three months you will have to pay 500 USD on fees (not even taxes) or, they say, you are a criminal and the US authorities will chase you. When I wanted to close my LLC they asked me for MORE fees, even for signatures up to 200 USD, even after my LLC was closed. Just pay a trip to the United States and open an LLC yourself, avoid the troubles.