This is something I would consider seeing as its tied in with CoinBase who, from the looks of things, has good security and who offers insurance on your bitcoin. Not sure I will dump everything I have there though but could be a nice add-on for some coins.
Wonder how they are going to generate the interest they plan on paying on the 'savings'. Guess the funds stored with them will be given out on loans and or investments. Will give it a go once it launches.
That is my main question as well, as far as I know the only way to make interest on Bitcoins is to invest them or the equivilent value, then to use the coins to provide loans denominated in Bitcoin as far as I am aware and act similar to a bank.
(Could see it being a lending source for something like fund managers who want to trade on Gemini)
That said it's still a while to go on this $400,000 will go a ways to launching it though and it's always good to see more venture capital put into Bitcoin.