it is a good site but they have had a couple of issues with system glitches/errors, Prices are reasonable as are the fee's.

PM if you want a referral link seem's you cant post them here.

I've split my mining between hashflare and eobot personally.

Hashflare gets a 8/10 (lifetime contracts, they never expire)
Eobot gets a 7/10 (5 year contracts but you can mine extra hash)