After a quick search, I couldn't find a thread with user impressions on this soundcard so I tought I'd start one. Took delivery of this card yesterday from Scan for £133, had seen it slightly cheaper elsewhere but hadn't heard of any of the sites selling it cheaper. Card comes in a lovely black and gold box, comes with a quick start guide, couple of small posters! and a booklet of test results. Also included is a toslink and 6.3mm adapter. Card was easy enough to set up in the PCI-e 1x slot, does require external power into a 4 pin connector on the card. Drivers on a disc with card but I downloaded the latest drivers from Asus. Software for the card is straight forward and nothing too fancy/complicated. I will only be using this card with my Sennheiser HD555 headphones so chose the headphone setting on the software. I'm not going to go into too much detail on the conncetions etc on the card as there is plenty off reviews on the net on this card that go into detail. Sound quality from this card is nothing short of amazing, using the 6.3mm headphone connector on the back of the card, it uses it's own inbuilt headphone amplifier to give an analogue signal, the headphone amp and dac on this card are top end audio parts according to reviews. The opamps for the headphone are also swappable. Listening to some music I have encoded to Alac on itunes, the results are astounding, no background hiss from the phones, nice tight bass that goes deep and a lovely clear sound from the mids and trebles. Couldn't stop listening last night, very addictive sound quality. Also tried briefly with a couple of games, again lovely sound from the phones, there is a option for a game mode in the software which allows the card to emulate EAX2 or 3. Here is a link to a review - http://www.guru3d.com/article/asus-xonar-essence-stx-review/ Sorry about rambling post and lack of technical details but I thought that posting the review link may help with that.