The core code has already been completed. We are now automating the backup processes, using IPFS as the data store, and making the user interface a hell of a lot easier to understand. For example, in the Smartcoins Wallet I am going to just use a little dark-sunglasses icon to annotate accounts and contacts that are Stealth. The fees are set by the multisig account holders so that can be adjusted at any time. In my opinion, fees should be as low as possible so that Stealth can get mass adoption much sooner. If my grandma can understand it, then I have been successful in its implementation.