I installed an Arakis ARC-8 in a LPFM despite some negative comments from friends. It's about four years old, and still works fine. There were some things I didn't care for about this board, specifically using the control room speakers for cuing purposes. I'm sure that was done for cost savings, not operator convenience. Sometimes you have to make trade-offs. After the warranty period was over I thought I'd make a few modifications. Since it didn't come with a schematic, I called Arakis and asked for one. No problem, I had it by email in a few minutes. The support person I talked to was quite friendly and most helpful. Despite rumors to the contrary, I really have to stand up for the service I received. Perhaps if Arakis would include a schematic in the instruction manual, it would dispel a lot of concerns and criticisms.
As for quality, well, it is a budget piece of equipment. It is not bad, and actually fairly easy to work on, but you will have to remove it from the signal chain to work on it. You'd be out of your mind to try to disassemble the mixer with the power on. The build quality is decent, especially considering the price. There is nothing that appears to be proprietary or unusual. I suspect most parts could be sourced from Mouser, DigiKey or Newark. Removing and reinserting the circuit board is a bit of a chore, which is only made possible by removing the plastic buttons from the switches. Without doing that, you will find it difficult or impossible to disassemble and even harder to put back together..
Is this the ultimate console? No, not at all, but it seems fine for its intended purpose. The lack of an audition bus is an issue for some, and not at all for others. Unless you'd be happy with a Mackie or Behringer mixer (which aren't really intended for this purpose) there is little else in its price range except for a couple of offerings from Allen & Heath. The AudioArts/Wheatstone consoles are considerably more expensive.
All that said, what do I have in my radio studios? Two have gracefully aging Wheatstone consoles and one has a vintage (but re-capped) BE rotary pot console.