I'm using them since monday and they are not neutral however not very far from that and definately not analytical. They have prominent bass with excellent extension and for an open back I would say that extension is mind blowing but in reality they are more of an semi open design. They leak very little and they also have quite a lot of isolation. Bass itself is not super tight, more of a pleasantly softer one with good but not amazing impact. It adds quite a bit of warmth to the sound in general. Midrange starts mostly neutral and gradually gets more pushed back when it comes to upper midrange. It gives more of a relaxed nature to the sound but it also lacks a little bit of presence and bite on a female vocals and drum roll for example. It sounds very good, kinda in analog way but laid back. Male vocals on the other hand are spot on ideal. Absolutely zero harshness and without any sibilance. Treble is neutral and of really great quality with superb extension. It feels very clean and clear, and also here, there is no harshness. I've heard even more refined and even cleaner treble but only in headphones costing 2-3 times the SR2 price. Treble is not warmer and sweeter like the bass, it's more of a neutral one and stays true to the recording.
The soundstage size is a little bit above average with good depth and layering. The sound is rendered very close to the listener and without any artificial veils or barriers. Soundstage also feel more studio recording session and not like a live concert - they are not boxed in but they are not airy either. Resolution, dynamics and separation are very good but nothing spectacular but that's to be expected from the warmer, fatigue free and little bit laid back headphones.
They are quite easy to drive, maybe not extremely but anything with reasonable power will suffice.
The build quality is very good, everything is made out of metal and feels sturdy. The headband is quite small and the size adjustment is basically not existent. In other headphones I usually am in the middle of scale but here they are very comfortable but at max extension so if someone has larger head they can be too small. Props for a spare pair of earpads and a hard case in the box. Cable feels nice and it's more like an IEM cable than over ear headphones. Overall I would say they are easy to like, very capable headphones with great price to performance ratio.