I’m considering buying this audio interface. I need 8 inputs, the price vs feature set looks impressive, and it works on Linux. What it misses vs the other alternatives I have looked up (especially the RME Fireface UCX II and the MOTU UltraLite MK5) are things I don’t need, and the price difference is significant. Some users seem to have found problems, some seem to be very happy. Given that most happy users don’t write about audio interfaces on the internet, I’m ready to give it a shot. 
Just a question, given that I have only synths and no plans to get a guitar / bass / drums… All these preamps, “Instrument mode”, “JFET”… can’t harm, right? I mean, I wouldn’t mind having 8 plain Line Ins but (according to my research) I will end up either paying way more (while getting more stuff I don’t need) or ending up with something that won’t work with Linux.
PS: and just for collection purposes, there was this comment somewhere else months ago: