Firstly I'd like to thank Hisenior for the amazing customer support throughout the process of making my desired custom version of the Okavango. I paid fully for the custom IEM with my own money.
The included packaging and accessories that come with the Okavango are outstanding. The amount you get, at this price point is superb. I don't think I have ever gotten an IEM so chalk full of accessories as the Okavango. The cable I received, which at least visually looks almost identical to a graphene cable I own, is very nice. Looks good, performs and behaves well. I'm not much of a cable believer outside aesthetics, comfort and minor change in sound (mainly due to material impedance) and for that I have no complaints at all. Plenty of included tips. An albeit not pocketable case, I will undoubtedly use this case when travelling as it fits multiple IEMs and is essentially a flight case for IEMs.
Now to sound: I have a large library of music spanding from late 60s all the way to music released just yesterday. I love looking for new music and have an ever growing, arguably too large library. If I had to mention a few things I do NOT listen to, K-pop and J-pop would be two popular genres I lack in my library. Having said that, the Okavango performs well with literally every genre I listen to. It's a warm sounding, soulful and fun allrounder that does everything well in my opinion.
BASS: Depending on whether you like a bass or not, left switch down turns it nicely down, while switch up can give you ear-tickling, chest thumping bass. It is not overly done at all, and only shows it's muscle if the song has a lot of bass. If not, it never overstays it's welcome. The bass is also medium-fast; meaning very natural sounding DD. As an example, I ordered the Penon 10th Anniversary Edition a while back - an IEM for 500 USD, praised by many for it's bass. I genuinely think the Okavango has superior bass. Overall I think the Okavango is a much better purchase than the Penon 10th, and that at 200 dollars less!
MIDS: Mids are lush and soulful. Not recessed or overly forward. I have a tendency to be sensitive to 2k and 4k peaks, and the Okavango never sounds too much to me. Just right 👌
HIGHS: Highs, much like the bass can depend on the switch. Personally I like sparkle and an enhanced high end and the Okavango hits the nail on the head for me with the switch up. If that's not your jam, then the right switch down tones down the treble by decent enough bit to likely not be offensive for anyone who prefers a more mellow high end.
Finally, onto COMFORT: I am quite picky when it comes to comfort. I have a small/medium sized ears and usually a lot of larger IEMs stick far out for me and can get uncomfortable over time, especially if they have a "custom" moulding to the shell. I would say the Okavango is medium sized, with no sharp edges and I can use it without issues for all hours of the day and never have it become uncomfortable!
TLDR: I love the Okavango. It plays all music well; it sounds fun and soulful and changes significantly depending on switch positions. I can use it all day without discomfort and at the price I'd gladly recommend it to anyone looking for a set around this price point!