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)
Akai EIE Pro is a great all aound companion for using a DAW and few or no external instruments, as it only has four mono in/out audio cnnections. It does, however have a four port USB hub and 5 pin MIDI DIN sockets. Some users run into issues after certain Windows updates with the EIE mysteriously halting any use and seeming dead. THIS IS NOT THE CASE. If this happens to you, REINSTALL the EIE Pro rivers from the original CD that came with the interface.Uninstall the EIE Pro driver that is not working first, then reinstall the original driver from CD. Many forums for this product are stumped and people pull their hair out over this- so hopefully Windows will fix this problem, if they have not by the time you read this. Send me a message or email if you do not have your install CD and I will send you a link to download an exact image of the install CD (you can no longer download the original drivers from AKAI, only updated ones) and you can either burn your own CD or extract the files from the download image to your hard drive and proceed. I have helped countless people ready to throw their EIE Pro against the wall with this issue and it works. Oh- yeah, the EIE Pro looks really cool with its lit up needle motion VU meters behind glass, chrome exterior and overall classic / classy look. And it sounds exactly as it should: perfect.
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.