Poolin is a mining company own and managed by bitmain one of the world top mining company that develop and produce mining device without doubt I do recommend this mining pool to users because it is backed by world top mining company.
Poolin has interesting features such as merge mining using Vcash also users can switch mining pool based on with mining process is more favorable if bitcoin mining difficulty is high a user can switch to other mining process with less difficulty. This feature are not find in lot of mining company.
Multiple crypto are mined on poolin so a user get to chose which crypto he will prefer to mine.
Being a transparent mining company transaction such as making deposit and withdrawal are fast process with in confirmation time.
With good security it engineering team are working round the clock to provide a safe and secure platform where it users privacy are protected against any firewall.