Had it for a week and immediately impressed by this card, it is exactly what I was looking for :-) It is a super small and affordable option for good quality audio playback and stereo recording. I've been able to monitor and play external synths from the input in realtime through a DAW, without perceptible latency on Mac.
At this price, it is hard to justify even looking for drawbacks, but there is one thing that required a workaround: when using it in my bedroom, the bright blue power LED stays lit all the time (when plugged into a powered hub). It would be helpful if there were a power switch on the board to allow it to remain connected when not in use, without producing light.
I'm somewhere between a beginner and an intermediate electronics 'tinkerer', and ordered some LM2876 amplifier IC's from Texas Instruments to "build my own amplifier". Once I had the IC's in hand, I realized that it was going to be a little more involved than building an amplifier based on the LM386, so I began my research. I found several circuit diagrams and examples others had built but was still not quite confident in my ability to properly complete this project. I found these boards and realized this was EXACTLY what I needed to make this project a reality. I exchanged several emails with the seller (Chichomecho) a month before I ever placed my order and, although there is a 6-hour time difference between us (I'm near Atlanta, GA in the U.S. and the seller is near Zürich, Switzerland) and wasn't even a customer yet, he always responded very promptly and gave me very detailed answers to my questions. I ordered 4 of these boards and continued to ask questions via email. I'm sure that some of my questions were "beginner" questions, but "Chichomecho" answered every question, provided me with circuit diagrams and photos of completed projects, and explained many things that I needed to consider for this build. Although he was just returning from vacation when I placed my order, I had all 4 of them in my hand, in PERFECT condition, in just 1 week. Did I mention these came from Switzerland to the U.S.? These boards are indeed VERY high quality and I have NO doubt that they will outlast all of the other components I'm using in this amplifier build. I cannot overemphasize how impressed I have been with this seller, his product, and this process. I would not hesitate, not for one single moment, to recommend EVERYONE purchase with confidence from Chichomecho. Thanks!