The '40B doesn't exactly fieldstrip intuitively:
Remove the magazine and, line up the red dot for the safety with the dot on the slide (just before the serations). Push the slidestop out with something pointy. I use the tip of a phillips screwdriver that I keep in my cleaning kit. Remove slide.
To reassemble, slide the slide onto the rails, line up the two vertical lines on the slide and frame, insert the slide stop as far as it will go then align the two dots again, and push the slide stop in the rest of the way.
IIRC, I believe CZ-75 40S&W mags will work, but the base plate on the CZ-40 mags are a bit fatter so there will be a little gap between the bottom of the grip frame and the mag. CZ-40 mags won't fit in a CZ-75 for the same reason. Of course, you could swap base plates and then they will interchange.
The .40 is approximately "Colt Commander" sized and shaped, but really has nothing in common with the 1911 except that Colt had some influence in it's conception. Even the grip frame angle is slightly different than a 1911's if you compare them side by side.
Internally, it's clearly a CZ-75 based design. It's a great pistol and I love mine!