Pros: Lots of inputs, simple design
Cons: too minimalistic? only one phono input
I've been playing around with the D1 for a few days now, and I must admit, its pretty good.
The large number of input possibilities (Optical, Coax, Analog in) as well as the built in USB DAC at this price makes it a very good value-for-money (if not a bargain) buy. The tube pre-amp is also a nice touch.
Considering that Maverick audio do sell these as a 'Desktop mini series', I only use mine in association with a computer and some bookshelf speakers (with the purchase of the D1 companion, the Tubemagic A1). I can see people using this as a 'mini standalone speaker system' though, and it does have the tools to do a (entry level) job.
The design looks solid. The dials are fine and its intuitive to use, although I would have prefered a small white hyphen '-' as the indicator (instead of a thin cut out) as it will give better indication of what volume and source you are choosing. One other niggle I have is that when choosing the source, I'd loved it if it had a small LED indicator instead of a printed on hyphen '-'. It would be easier to see what source you are using.
The bypass button is really useful. When its not pushed on, you can use the volume dial (and the headphone out) to adjust volume. When it is pushed on, you can adjust the volume on the device you connect to this.
All in all, if you are looking for an entry level (and cheap) multi-function DAC, you have to put this on your shortlist.