What are the pluses of screw pile?

What are the pluses of screw pile? They are universal and can be used in many areas. A screw foundation is suitable for pierces and berths, on slopes, above streams and so on. Work can be carried out at any time of the year and without restrictions on the state of the weather. Such a foundation is 20-30% cheaper than concrete, while it is built in 1-2 days and does not require mandatory earthwork. It is reliable, durable and is distinguished by a long service life.