diff --git a/src/sunstone/etc/sunstone-server.conf b/src/sunstone/etc/sunstone-server.conf
index 777dc53f0a..762b565662 100644
--- a/src/sunstone/etc/sunstone-server.conf
+++ b/src/sunstone/etc/sunstone-server.conf
@@ -126,37 +126,45 @@
 ################################################################################
 # Default instance types for the cloud view
 ################################################################################
+#
+# These types are presented in the cloud view to customize VM Templates. Each
+# type is defined by:
+#   name: the name of the type
+#   cpu: capacity allocated to the VM for scheduling purposes
+#   vcpu: number of cores
+#   memory: in MB for the VM
+#   description: to help the user pick one, it may include purpose or price.
 :instance_types:
     - :name: small-x1
       :cpu: 1
       :vcpu: 1
-      :memory: 512
-      :description:
+      :memory: 128
+      :description: Very small instance for testing purposes
     - :name: small-x2
       :cpu: 2
       :vcpu: 2
       :memory: 512
-      :description:
+      :description: Small instance for testing multi-core applications
     - :name: medium-x2
       :cpu: 2
       :vcpu: 2
       :memory: 1024
-      :description:
+      :description: General purpose instance for low-load servers
     - :name: medium-x4
       :cpu: 4
       :vcpu: 4
       :memory: 2048
-      :description:
+      :description: General purpose instance for medium-load servers
     - :name: large-x4
       :cpu: 4
       :vcpu: 4
       :memory: 4096
-      :description:
+      :description: General purpose instance for servers
     - :name: large-x8
       :cpu: 8
       :vcpu: 8
       :memory: 8192
-      :description:
+      :description: General purpose instance for high-load servers
 
 ################################################################################
 # Routes