Alright, so I am not an audiophile by any means, my entire experience of headphelia is just using cheap IEMs but after trying some expensive beats, I knew I needed something more.
And if your like me you want one pair to be your main man until it kicks the bucket a couple yours down the road.Not knowing what you want makes buying headphones hard, and so you take to the internet expecting some advice but then get thrown words like warm, shimmering highs, soundstage, and then you get caught flat on your face with too many options to choose from.  I am going to give you my honest impressions and experience, not a whole description of each thing you will hear, because no online review will ever truly describe the experience you will have. 
 
And now to the HD 598's.If your reading this review your probably upgrading from some under $100 headphones, since i doubt that your downgrading from some nicer ones, and the 598's are one of your options. 
 
I shall refer to the headphones as 'she' from here on out by the way. 
 
 
Comfort:  
She kisses and conforms to your head, "like a glove". I have pre-historic sized ears and theyre very sensitive but she makes love to them 10/10
 
Looks and Feel:
Very Luxurious, highest of quality, even though its all plastic. I love the look, I feel fancy as fu...I feel fancy while wearing her. 9/10
 
Sound:
I won't even use the words highs, lows, and mids in this review. I will put into more authentic words: You can hear everything, you will hear your music defined and articulated in a balanced area around your head. You will hear new parts of every song you thought you already knew and you will hear the parts you already knew in a better light. I'll summarize my experience with these headphones with a couple words: Balanced and rich accuracy. She won't block any part of a song with another part unless the artist intended that when he/she recorded it. 
 
The songs that blew my mind while using these puppies: "listen to the music" - The Doobie Brothers, "Trembling Hands" -Temper Trap and pretty much anything i through at it actually. 10/10
 
Open Back Headphones:
One of your main concerns about her might be that she's open(yes that sounded dirty, but we're too mature to giggle[Ha yeah right]), which means sound will get in and out of her. I actually prefer sound to leak in, it gives me awareness of my surroundings, although when I am listening at moderate volumes most background and ambient noise is blocked out, so only someone or something demanding my attention will pull me outside of my paradise of music. Now for other people hearing your music, I have found that when you are in quiet places(library, office) if you keep volumes below 50% coworkers and friends won't even hear it, of course if you are at least 5 feet away. And if your in a moderately noisy place(coffee shop, etc.) you can have your music as loud as you want. Fortunately you will get the same amount of rich articulation at any volume. But your smart though, you won't be blaring her full blast in a business meeting or during an exam. 
 
So what I am trying to get at is if the fact that shes open is deterring you from buying, I would go for it anyways. The musical experience you will have will outweigh the small amount of cons. The sound is too damn good to even care that they are open unless you NEED to cancel out noise, then to that I say what the hell are you doing here, get closed headphones.
 
Oh I should mention that she doesn't shake your head with bass, she whispers it right into your soul, which i absolutely love. But if you want to shake your head with bass just get some skullcrushers.
 
 
I got these for $160(Canadian) which was a steal, but i think these are worth it for their full price ($240 on amazon.ca). I wasn't planning on spending as much as I did but I am glad I made the leap of faith.
 
If this is your first upgrade from cheap earbuds, like it was for me, you'll be very satisfied with her.
 
 
 
Cheers,