Jelly Jerry does it again. What he can do with carbon fiber and titanium while retaining an elegant highly functional simplicity in his style is something to behold. Another fantastic design and build quality by Twosun. The titanium is beautifully milled, the carbon fiber is always perfect, no voids or defects. The fit up of the carbon fiber inlay into the titanium is seamless with no major gapping, chipping, sharp edges, etc. The knife is very well made, no blade play, blade is perfectly centered, and the action is nice and smooth as usual for Twosun. Even with no reverse detent track, the blade tang has a canted 45° edge that makes it easier for the detent ball to break the plane of the lockbar, which is a nice touch since they didn't mill out a track. Jelly Jerry sometimes doesn't have the reverse detent tracks on his designs, so I think this is a good secondary option to retain that glassy smooth action.
The overall look of the knife is just gorgeous. That clip point blade with it's aggressive clip looks killer. The handle is very well designed to match the aesthetic of the blade, giving the knife an overall balanced and ergonomic look and feel. The handle fits perfectly in the hand for one of the nicest ergonomic grips and locks up solidly despite having no jimping on the blade. The flipper tab is perfectly angled and has the right geometry to actuate the knife easily every time. The little cut out on the top of the handle where the flipper tab rests in should have been used for a hidden flipper tab while making this knife a front flipper (it's a missed opportunity in my opinion), but having that cutout gives the finger a perfect resting spot to engage the flipper, which makes up for it.
As usual for Twosun, the knife has a ceramic detent ball, ceramic caged bearings, lockbar insert/over travel stop, and quality T8 hardware.
The pocket clip works well and looks great. Love the design of it. My only gripe, which is just nitpicking is the fact that the micromilling on the clip doesn't match the angle that it is on the handle scale. It would have been a nice touch if they milled the clip's lines to face the same angle as the handle, but again, just nitpicking.
My one and only con for this knife is the fact that the blade is somewhat easy to touch in the closed position while in the handle near the top of spine area. This may be a concern if you're reaching into your pocket to grab something and you end up slicing your pinky. This is more so an issue for smaller hands since larger digits probably won't touch it, (even if you tried) but it's still something to watch out for nonetheless.
Overall, it's an excellent design by Jelly Jerry and well built by Twosun. There's no going wrong picking up one of these if you get the chance.

What a beautiful knife. The transition of the titanium handle and carbon fiber is seamless and what gorgeous carbon fiber it is. The clip point blade of M390 is fantastic with not a scratch or fingerprint to behold. Smooth opening and closing blade and very sharp. Great job Two Sun!