Really great wallet with room for improvement.
I've only had the Ekster Wallet Pro for a few days, but I already love it. The materials and build quality are impressive (we'll see how well they age). I've been using a "non-mechanical" slim wallet for the last few years and find the access to my most used cards much improved with this wallet.
However, if the option had been available, I would have ordered the wallet without the elastic strap. I do not like to open a wallet and end up flashing cash to anyone in the vicinity. Thus far, I am storing my cash in the back slot of the leather flap where it is out of sight. For me, the elastic strap just adds unnecessary bulk (thickness) to the wallet. I have actually removed the embossed leather square (which did look nice) from the strap which reduces some of that bulk and helps the flap/cover lay flatter.
The other thing I'd like to have is a dedicated driver's license slot with a clear window or opening such that it could be displayed without removing it from the wallet. The perfect location for me would be the inside of the flap/cover. My last couple of wallets had this feature and it was very handy.