Was excited at first because it has great potential with the "assistant" that organizes your receipts, subscriptions, & package deliveries (great for me job). My excitement quickly went down hill with the TERRIBLE sync issues.
Badge icon stays after reading the unread emails making me have to re-open the app then waiting a good 10-15 seconds for the syncing to work. Going back to the stock Apple mail until there is an update to fix this.
RetroSpaz about Email - Edison Mail, v1.4.1