I had some problems with drivers for Mac OSX Yosemite, and it took Akai about 9 months to roll out the proper drivers. Other then that it is a great device and is built like a tank.
I like the oldschool look of this interface, besides that I had a lot of issues without knowing exactly from where these came from, maybe because of the ASIO Drivers but I don't have a clue. It is still very practical when it works, I won't recommand using the USB HUB that will cause lots of crackling then some growing numerical distortion then you'll have to press the power off button! (I tried to plug a M-Audio usb midi keyboard)
I'm not really picky when it comes to sound cards, because I don't use much outboard gear, but it sounds nice I guess. I've been having trouble using headphones though, especially when using 3.5mm to 1/4" adapters. I've only been able to get the headphone jack working with a small guitar amp connected using a 1/4" cable.