UMC1820 : Not bad for the price.

Initially, the sound quality of this interface seemed a little thin and harsh with low bottom end, but after a couple weeks usage it settled down and sounded good. Not really sure why, either it's psychosomatic or the circuitry needed to run in for a bit.

Build quality is quite reasonable, and the knobs feel smooth enough however after 6 or so months usage the headphone knob has started to crackle. Worth bearing in mind.

The front panel is laid out quite well. Monitoring can be a bit of a challenge though as you can only choose between inputs 1-2 or 3-4. There doesn't seem to be any way to monitor inputs 5-8 or SPDIF/ADAT inputs. You can also only monitor outputs 1-2.

There is a handy knob to crossfade between input and output monitoring, however it has a poor crossfade curve and setting it 50/50 will result in a significant volume loss.

Driver-wise, it's a standard Behringer affair. The ASIO drivers are very basic but does the job quite transparently. Latency-wise, It's not great but not terrible either. I've tested it with Propellerhead Reason v10 and it tends to struggle at 64-128 samples. I would recommend either 256 or 512 samples depending on CPU workload. Using it with ASIO4ALL seems to have an even worse result.

Overall, the price to performance ratio of this interface is still unmatched. If you can deal with its quirks then it is incredible value for money.