I've been listening to them for ~3 years and I really like them!
While StackBros (who I'm 90% sure at this point is actually stack's brother, which in hindsight seems kind of obvious), Stack, and ACTRock are all great arrangers, what gives Akatsuki Records it's charm is definitely stack's voice.
There's a lot of incredible Touhou vocalists (Some favorites of mine being Denki, Chata, Merami, IZNA, 556t, Ranko, Okogeeeechan, Fujiko, and Shuuzou) Stack is still my favorite.
A friend of a friend got to shake her hand, and I'm pretty jealous.
I also bought the album set they released around new years, and it came with a calendar and a freaking coloring book, which is awesome.
One of my dreams is to go to Reitaisai some day, and while I'm there I'd love to shake stack's hand too.