I created a new, empty subscription and tried to follow our demo steps and ran into a number of issues relating to using an ARM template for deployment.

Example Error #1
Long running operation failed with status 'Failed' {
"status": "Failed",
"error": {
"code": "ResourceDeploymentFailure",
"message": "The resource operation completed with terminal provisioning state 'Failed'.",
"details": [
{
"code": "DeploymentFailed",
"message": "At least one resource deployment operation failed. Please list deployment operations for details. Please see http://aka.ms/arm-debug for usage details.",
"details": [
{
"code": "Conflict",
"message": "{\r\n "error": {\r\n "code": "StorageAccountAlreadyTaken",\r\n "message": "The storage account named vhdstorageki7qdyzg6loo2 is already taken."\r\n }\r\n}"
}
]
}
]
}
}

Example Error #2
Long running operation failed with status 'Failed' {
"error": {
"code": "DeploymentActive",
"message": "Unable to edit or replace deployment 'demo100vmNicIp': previous deployment from '5/27/2016 3:49:49 PM' is still active (expiration time is '6/3/2016 3:49:47 PM'). Please see http://aka.ms/arm-deploy for usage details."
}
}