Now known as the DasWallet, this is the world's most secure wallet and exchange that is will continue to be developed and improved. A massive integral part of the Das Ecosystem that will make it's mark in the world of FinTech and blockchain technology.
I really like this service. It is very secure. In order to make any transaction you have to use validator device (it is the same as ledger nano s but different firmware). The webwallet is more like an exchange. The Validator device is actually a hardware wallet which is supported by web wallet. Validator supports also bitcoin etherium and some other main crypto so you can use it the same as ledger nano s.