Sometimes it's hard to respect the deadlines in software development, a lot of things can go wrong and have to be fixed before the release of a final product. It happens even to the biggest companies in the world. So far they have delivered everything they have promised. So you have to decide, either you believe they are scammers and will never deliver the wallet, you then will probably want to sell your coins asap to those who will be more than happy to buy them at cheap price, either you accept as true what I just stated and you wait and hold even if it takes a bit more time. I'm sure they are well aware that it is bad advertising to not deliver the things in the right time and I'm sure they are sorry for that. But at the end, only the result will count. In few months/years no one will mind that they missed few deadlines as long as the product is as good or better than what was promised initially. Personally I believe they're working hard to deliver everything they've promised and only the long term holders will be rewarded accordingly. Maybe I'm wrong but I'm willing to take the risk. Do your choice now.