Gosh, I love these headphones. I bought them after my Xiaomi Piston 2.0 broke, and I have to say, these are a considerable improvement in every department. Now let's get to the review
 
Build Quality - The feeling you get when you hold these and gaze upon their majesty is something to behold. The stainless steel construction makes these super heavy. These things just look so elegant. Another review called these the Aston Martin of IEM's, and I wholeheartedly agree. From the jack all the way to the buds, all they do is scream quality. Bravo to the designers over at RHA. 5/5
 
Accessories - Oh boy, you get a lot of them. First up is the case. I'm not sure if it's real leather, but I doubt it is. Nevertheless, it's super soft feeling and looks really nice. One complaint, though: It's a little bit big. The darned thing is easily visible in my pocket, and it takes up so much room I can barely squeeze my wallet in with it. And then we have the extra tips. You get 2 pairs of small ones, 2 pairs of mediums, 2 pairs of large ones, a pair of small bi-flanges, a medium pair of bi-flanges, and 2 pairs of foamies. And they all come in a super cool stainless steel (probably) plate. Everything is so gorgeous. 5/5
 
Sound - This is my favorite part. Let's start with the bass. The bass extends so frickin' low. The sub-bass is absolutely superb. The bass notes in Daft Punk's "Doin' It Right" are so clear and powerful. The bass is very well textured and is tight (although, not the tightest). These are definitely a bass oriented headphones. The mid-bass is where thing start to get a little messy. Just a little bit though. The details in this area are somewhat overshadowed by the bass power, leaving the impression of a somewhat veiled midrange. No to worry. The mids are still excellent. They are a little recessed, but the details are all there. Thom Yorke's voice in Radiohead's "Life In a Glasshouse" is so perfect. The timbre in his voice comes through very well, and the tiny variations in his voice are evident. The horns punch through with impressive clarity and spaciousness. The sound of the reed of the clarinet can be heard with ease. The bass line rolls along with strident confidence, and not for a second does it feel disconnected or out of balance. The treble feels laid back at times, yet somehow it can feel very bright as well. It is very forgiving and is never harsh, to me. treble extension is decent, and overall it is very nuanced and blends in perfectly with the rest of the sound. Surprisingly, these bad boys play well with heavy metal. No matter how fast August Burns Red's drummer Matt Greiner bangs on the double bass drums, the MA750 will play it with ease. The separation on these cans is magnificent. 4.5/5
 
Comfort - After sorting through the myriad of tips, I found the foam ones played best with my large ears. The 'phones wrap around the top of the ear, which may be a problem for some folks. I wear glasses, and it never bothers me. One complaint about wearing these: when walking with them in with my phone in my pocket, they pick up the static electricity and sometimes zap my ears. It's quite a strange phenomenon, actually. But not at all a pleasant one. 4/5

Sound - Let's start off with the most important category.The sound is so smooth and warm, like a warm glass of milk. It's really quite comforting. They really work well with most genres. In Radiohead's "I Might Be Wrong", the bass line tickles the left ear with depth and decent detail, while the guitar occupies the right side with intimacy. While the snare sounds a little dull and Thom's vocals seem lacking in texture and timbre, it is not at all offensive. The treble is very laid back on these headphones. Too dark sounding in a lot of cases. An equalizer will help. On the other end of the musical spectrum, Swedish House Mafia's "Don't You Worry Child" sounds exciting and spacious. The song distinctly sounds like it's coming from inside a club. The bass rolls along with power, yet nothing seems drowned out. And this is all with the headphones powered off. Flick he little switch on the right ear cup, they will bring out your inner basshead. It really brings out all of the low rumblies in the music you might not have heard before. Although, it does start to sound loose and it does start to have a significant effect on the mids. Overall, if you like warm sound with great bass, look no further.
 
Comfort - If you have a large head, big ears, and wear glasses, be warned. Despite the soft memory foam pads, they are always pressing my glasses against my skull. After watching a movie with them, I need a break. Also, my ears don't quite fit inside the headphones. They kind of just sit on top of my ears. However, I still manage to get a good seal with ease.
 
Build/Looks - Obviously, these are meant to appeal to millennials, such as myself. With design cues from the very successful Beats line, these, to me, are an attractive set of cans. They will be noticed if worn out in public. The build quality is excellent. The outside of the headband is covered in a soft touch rubber material. Unfortunately, it is a fingerprint magnet. The cups are plastic with metal accents. The inside of the Headband is made of thick aluminum that is quite strong.
 
Noise Cancelling - Don't think of this as a main feature, but more of an extra. The noise cancelling pales in comparison to most other NC headphones. It will help get rid of the rumbling of the bus of train, but it won't do much else. However, the headphones themselves without NC are excellent at blocking out sound. Another thing that the noise cancelling does is increase the bass. A lot. The bass becomes subwoofer-like. You'll either love it or hate it. It makes movies more exciting and has the same effect on Electronic music. 
 
Wrap-Up - Overall, these are great headphones. The smooth, warm sound is enticing and its good looks and build are a good touch. Excellent buy, especially for ~$70.