We run 50+ linux server on azure (west europe) and it's a nightmare, vm reboot unplanned,VHD diseappear. Timeout or unreachable blob files on HDInsight (with PIG)... Slow load balancer not really configurable. Website slow++.
I won't recommand it... Very hard for us to keep a professional SLA.
Maybe it's because we run linux server ?
One good point is cheap blob, slow but cheap.