For me it is HashFlare. Here are few reasons:
- It provides detailed real-time mining statics from anywhere at any device.
- There are no any hidden fees and provide affordable mining equipment. Furthermore, you can use discount code to save up to 10% off the regular price.
Allows you to select your own pool for finding maximum profitable combination
The latest promo code you can get here:
https://bitcoinmining-cloud.com/As far as i know hashflare hasnt provided any proof or video they even own a datacenter.
So dont be so sure about those "real time mining statistics".