Studio, long time...
I've milled tons of hardwood on mine (not a Sieg SX2, mines the Grizzly rendition but the mini mills are pretty much all variations of the same theme out of the same factory in china)...run it fast, use sharp tools, no worries...and hella quieter than my router...imo, buy cheap router bits so you can change them often...I just found that a $10 bit that you use for 10 jobs gives better results than a $20 bit you can use for 15 jobs, but that's just my opinion. But when it comes to true end mills, spend the loot, they're worth it (the tooling is what will kill you $ wise), and trust me, if you get a mill vise, buy a set of parallels, you'll think they can wait but trust me, they are a necessity.
Brass and Alu. are no problem, even cold rolled and SS in small bites