“It's a little fiddly to solder this - you need a soldering iron with a fine tip, and to take your time when you do it, I had it clamped in a Panvise Junior when I did it Tip: to get the STEM to sit completely flat against the RPi0 base without damaging anything put some blutack on the arms of the vice and then clamp it. That'll let you apply enough pressure without damaging any components on the surface of the Pi. Once that's done, just follow the mods above and boot your new dongle computer :-).
I plugged into a MBP and could SSH and VNC into it without any problems. You do need to manually set the screen resolution if you've not got a monitor plugged in to the RPi0 to make it usable for VNC. I just uncommented the lines in CONFIG.TXT #framebuffer_width=1280
#framebuffer_height=720 to force 720P. That worked perfectly.
On the RPi0-W the wireless still workes perfectly despite running Ethernet over the USB as well. You just have 2 IP addresses for the Raspberry Pi.
Makes a very good development platform you can take with :-)”