We were lucky and got a lot credits from rackspace and azure and we used them for our services and servers.
Result: We had insane number of bugs, weird things, unstable behaviour and things that even phone support found it weird. I checked my inbox, I had over 270 email exchange with most horrible support I have use Microsoft support ( we use around 50+ SASS services)
For over a month, we are in amazon AWS, just works, just amazing and we had zero problems..
For anyone out there,
please dont take the toxic credits from azure or rackspace, directly pay for amazon. It will save u time, sanity, and money.