This is the updated Digi + Pro, now called Digi2 Pro ($44.90 ex shipping). I bought it after reading the SBAF discussions on the Pi2AES ($149) , and figuring my Gungnir Multibit doesn't connect to any of it's fancy outputs. The Digi+ Pro outputs digital via Optical, RCA or BNC so it's a good match. I'm hoping it will improve audio quality by reducing jitter. I was upgrading my Pifi Digi+ ($17.50 on AliExpress including case) sitting on top of a Raspberry Pi 3 and running Volumio. HiFiBerry's Blog post for launch says: The Digi2 Pro is slightly smaller than the PiFi Digi+, and with a different arrangement of outputs. I will use the same case, just omitting the faceplace on the output side. The Digi2 Pro worked fine with my existing Volumio I2S settings. I then changed the I2S the setting from Digi to Digi+, which I'm guessing enables the clock switching. How does it sound? On powerup I was immediately struck by the placement of instruments and the expansive soundstage, and the crispness of cymbals... It's mandatory to write that kind of text, right? Honestly, it sounds about the same, maybe a slight improvement in spaciousness. I think that is as much as can be expected for digital source changes. Maybe I'll notice more in time. I removed the jumper which is described for earlier models as a way to get full galvanic isolation. With the jumper, there is a high-resistance ground connection to make sure the receiving side isn't on a floating potential (which creates problems with the transformer shielding). Removing the jumper might have helped. I'm currently outputting via RCA but will likely grab a BNC cable in future. I probably won't use the DSP add-in board functionality. DSP functionality is already available in Volumio via BruteFIR, and it seems to do room correction filters quite well without putting much load on the processors. So for my specific setup, the upgrade benefits were: * Supporting the designer. I'm assuming the PiFi is a knockoff of HifiBerry's design. * Dual clocks * Better components, hopefully * Galvanic isolation * BNC * HAT passthrough. I could attach a screen or other expansion in future. * Cooler-looking, black circuit board * Plausibly better audio And the costs were: * The expense * 5 minute install * This post.