I'll give it a try, A LOT of similarities with SC annoys me a little, but I' ll see what this show has to offer. After all, it's hard to give opinions only after one ep, my feelings might have changed... But I'm a very slow viewer and tend to watch a couple of dramas at once, so it'll take me a lot of time to ev. finish this
After ep1 it just feels like cheap SKY Castle rip off for me. At least in SKY C they had some realistic goals and class, but what is with everyone wanting to be a classical singers? In Penthouse those characters seems like rich people cosplayers and everything gives soap opera vibes. I might give it a try, but I def won't be as enthusiastic about it as most vievers.
The whole concept for this drama had great potential, but it was ruined by annoying and illogical actions of SaetByul mother. Lee BoYoung is an amazing actress, but her character here was unbearable.