There is plenty of issues with the current driver, if you run win7 you might not run in to all of them especially if you don't use to many of the extras on the card.
The card is however advertised as win8 compatible and promoted with certain features, very little of this does work in reality. Today i swapped back to a D2X because i don't use the headset much atm so there is no benefit at all with the phoebus. With the D2X you can run UniXonar which makes it alot less buggy. I hope they can sort out the drivers soon for the phoebus but im not holding my breath.
| Sabertooth p67 rev b | i7 2600k @4,8GHz | 2x8GB 2133MHz Corsair | MSI GamingX GTX 1080@2125MHz | 256GB Samsung 840Pro | MX300 1TB | 2x 120GB Intel 510 | Xonar Phoebus | Zalman ZM-850HP | Logitech G810 & SS Rival 500 | Acer Z35 |