My review might be a little bias due to my expectations.
I owned the Tanchjim Cora until a cat chewed them up and I really loved those. Basically what I personally wanted would have been the Cora with a detachable cable and more detail. The Cora is an extremely energetic and spacious with exceptional bass for an IEM.
The Oxygen is most definitely not that. The Oxygen has a relatively laid back sound and is crystal clear. A lot of IEMs even in this price range cannot provide that clarity, however it is lacking in extension on both ends. I would say it's the most uncolored headphone / earphone / iem that I've ever owned or maybe ever heard for that matter. So if you are doing any sort of audio work with IEMs or prefer a neutral sound this would be a good choice. I would not call them analytical however given the general consensus of an "analytical" sound is more harsh.
I will say there's nothing the Oxygen gets wrong, however it's not coloured to my exact preference for listening to music (my favorite headphone is the Fostex TH-900) and fell short of my falsely set expectations. I expect I will keep and use them for a long time however.