Why you should use the Rx version of this library

• as against just SNTP, you get full NTP (read: far more accurate time)
• the NTP pool address you provide is resolved into multiple IP addresses
• we query each IP multiple times, guarding against checks, and taking the best response
• if any one of the requests fail, we retry that failed request (alone) for a specified number of times
• we collect all the responses and again filter for the best result as per the NTP spec