Very nice cans with a few drawbacks
4/5 for bassheads who ALSO don't mind using an equalizer or people who just want EDM cans
3/5 for anyone not using an equalizer or SOLELY using this for EDM
2/5 for everyday listeners with no equalizer, at high volumes these hurt the ears in some cases
First of all I'd like to preface this with saying I bought a Loki from my namesake to go with these headphones and I'd probably be a lot less happy with them otherwise. The sound is pretty amazing, bass is quite clear, mids sound great, highs are a bit on the brighter side but with a bit of tuning they sound far better.
If you're buying these headphones I'm going to assume you're a bass lover so that's really what my star rating is focused on, how good the bass sounds and how much/little it effects or drowns out the other sounds, it performs amazingly in this regard.
Mids sound a bit recessed, the detail is good but at this price range it could be better, if you're coming from a pair of 6XX cans this might be noticeable to you but I'd say they are in the same class. It's not that it sounds BAD in comparison, it's just that the mids pop a bit less with the TR-X00. This is again, after using a Loki to tune them a bit. Flipping off the tuning leads to this issue being magnified quite a bit and I'm not sure if I would be able to recommend these for every day listening if you have no way to tune your sound.
High end is just too loud for me, my Loki's high end adjustment knob is forever at the 9 o'clock position which isn't a huge change but keep in mind I LIKE a V shape sound and without it I find myself wondering why on Earth every snare drum and cymbal sound hurts my ears at high volume. Take it down a bit and it's a beautiful thing, the bass is still why I'd buy these headphones but the definition in the high ends is a pretty close second too.
Now...when it comes to things NOT related to sound (mainly design) these LOOK great and...well that's about it. The hinge on them is flimsy, I fear putting any pressure on them and rightfully so judging by the stories of people breaking them. The cord has begun to twist and the proprietary plug makes replacements a pain to buy. You can always buy from this manufacturer but when they stop making them...well I hope you like to solder and cut 400$ products because if not these are destined for the bin. They also have a large connector, if you add a 3.5mm adaptor it becomes even larger, not sure using your new phone is in the cards even if it could drive these to a decent volume, it'll work but make sure not to hook anything on your 3" long connector or you may lose your headphone port. The earpads are leather and yeah, they make you sweat. The construction uses a fair amount of glue and the screws used a VERY small, screw into plastic, and could easily be stripped so I'd advise against taking them apart often. All in all not very good for 420$ and I've already cannablized my old DT990s ear pads and headband cushion for a marked improvement in comfort.
Overall I'd say this is a 4 star pair of headphones IF you have a decent equalizer (software or hardware would be fine), the build quality isn't SO bad that I'd take off more than a star with the hinges being the really iffy thing. The bass is just outstanding and IMO worth it to true bass heads.
If you are buying these with no plans on altering the sound or if the idea of using an equalizer sounds like blasphemy to you...you'd probably be happier with a pair of 6XX, at best these are a 3/5 for all day listening without some way to reign in the highs. EDM is going to be the exception of course but even then I feel like a pair of 6XX with a Loki is going to give you 85% of what these can do, the 15% being all in the base where these cans really shine. If saving that 100$ doesn't matter to you these are still very nice cans, just way more sibilant than I'd like and it has a tendency to make high volumes unpleasant.
Would recommend to a friend.