Received my Positron just now. It's a real nice little EDC flipper. Not perfect with pluses and minuses.
On the plus side, it's thin, narrow, trim and light (2.61 ounces). The blade is sharp, centered, no blade play. With FFG and 0.114" thickness it should be a great slicer. Flipping action is great even with the low profile flipper tab. The real CF is really well done and affords very good traction.
On the minus side, it's a little difficult to disengage the lock since there's not much room or better cutout. Although the handle length is 3.96" there's only 3.4" room for a grip. You can get a good grip but you need to bunch up your fingers real tight. Also, the bottom of the clip where the screw is does create a hot spot when gripping it tight which you kind of need to. Hate to have to remove the clip.
I'll carry it all day tomorrow and see how it goes.