diff --git a/README.md b/README.md
index db76689..6f75346 100644
--- a/README.md
+++ b/README.md
@@ -4,6 +4,14 @@ Special implementation of merkle mountain ranges (MMR) for ZCash!
 
 [![Build Status](https://travis-ci.org/NikVolf/zcash-mmr.svg?branch=master)](https://travis-ci.org/NikVolf/zcash-mmr)
 
+The main design goals of this mmr implementation were
+
+- Allow zero-cache and avoid db callbacks. As it is implemented, calling side must just smartly pre-load MMR nodes from the database (about log2(tree length) for append, twice as much for deletion).
+
+- Reuse as much logic between rust and c++ clients and place it here and librustzcash.
+
+- Close to zero memory consumption.
+
 # License
 
 `zcash-mmr` is primarily distributed under the terms of both the MIT