The premium hosted edition of this service isn't inspiring confidence if their front page, presumably residing within the same cloud infrastructure, can't handle the HN hug of death.
Operational issues aside, I love seeing open source self-hosted breaking into retail wealth management. Right now, it seems everybody I speak to that isn't a professional or institutional investor defaults to a frankenstien combination of spreadsheets and/or web frontends exposed by banks and 'standard' wealth management sites like Wealthfront/Bettermint.