diff --git a/README.adoc b/README.adoc
index c771bab..ddeea77 100644
--- a/README.adoc
+++ b/README.adoc
@@ -528,7 +528,7 @@ Our prebuilts currently include:
 * Linux kernel
 * root filesystem
 
-Advantage: saves time and disk space on the initial install.
+Advantage: saves time and disk space on the initial install, which is expensive in largely due to building the toolchain.
 
 The limitations are severe however: