Audient iD14 MKII

It's very similar to the iD14 Mark I that I upgraded from. It has problems with the Asmedia USB-ports and will cause a slowdown of the audient application. Runs fine in my Intel USB-ports though. I had the exact same problem with my mark one unit.

Included USB-cable is very short (1 meter) and it's USB-C to USB-C only. It feels good though and is rubberized. There are only two cons that I really can blame audient for: No power button and no dual 6.3mm headphone jacks. I don't understand why they didn't go for two of the same socket and separate volume controls for them.
The big nob has a bit of a wobble to it, slightly worse than my mark one.

Other than that it has great audio both for mics and headphones. It cannot drive my Shure SM58 to a satisfactory level though without using too high gain and/or software boost. You'd need a separate booster to reach good audio levels without pre-amp noise when using a hard-to-drive dynamic microphones.

The most "popular" review on this site is a disgruntled customer who may have received a unit that got past inspection in poor order or else was damaged in transport. This does every other positive an injustice. My experience of this unit after two weeks has been excellent so far.
Pros:
DA Conversion: Superb - I have interfaces from Zoom (R8), Tascam (US 16-08), Behringer (404HD and UMC 1820, ADA8200 Pre's), Native Instruments, Maschine Mk 3 and ocassionally I use the Digitakt as a DAC when operating in a DAW. I can safely say my unit has by a very audible margin the best output audio quality of any of the aforementioned. The Behringers may beat it in output volume (the 404HD in particular) but the claritiy of the audio with the ID14 is exceptional.
2) Loopback: This features allows you to flawlessly record incoming audio from any source within your computer directly into your DAW. A particularly nice feature for podcasters and OBS users as well.
3) Build is excellent, but I expect that from a "premium" product.
4) 8 x 48K ADAT inputs. This means I can offload the UMC 1820 and the Tascam and upgrade my monitors :)

Cons: wish it had a 5 pin din in/out like all the other units I have.

Highly recommended especially for the additional features.

Nice quality metal chassis. Great sounding input and output preamps.
Enough gain on mic inputs to drive sure sm57 without additional amplification. Gain control could be a bit better. First 90% of gain gives smooth slow change. On last 10% every movement gives much more pronounced changes. Also the last 10% starts to get quite noisy - escpecially so with the phantom power engaged.
Headphone output is great with higher impedence headphones. Unfortunatelly with low impedence headphones it losses its flat response.
The instrument input on the front is great for both low and high output guitars and basses (had some software glitch at first which made high output guitar clip even on lowest gain setting, after reset it handles the output with enough headroom). However using the instrument input takes over one mic input so You can only record two tracks at once, but I think that most interface in this price range behave that way.
My biggest gripe is latency. At buffer size of 32 I am getting about 7 ms round trip latency on 2020 Macbook M1 (tested with rtl utility and cable looping back output to input). It's about the same that my 12 year old Komplete Audio interface. It's not that bad for tracking guitar (depending of course on additional latency introduced by plugins used) but tracking vocals with this latency gets quite annoying.
The software mixer that comes with the interface is very nice. You can create seperate mixes and easily control the routing of inputs to ouputs. Internal loopback is a nice addition, though it would be nice to be able to assign virtual loopbacks input to different mixer inputs. Now the loopback is on inputs 11 and 12, in some applications (like zoom, teams, discord etc.) you cannot choose which input is being used - they just pass whats on input 1 and 2 by default.
All in all very nice interface. Superb audio quality for the price. If you don't plan on using high gain guitars and don't mind the round trip latency, this is the best audio interface to buy at this price point