...and I love it! It's superb even at ISO 1600, and that opens up a lot of options for using natural light in the background and flash in the foreground. Here are some recent shots with it:
7-spot lady beetle, 57-shot stack in natural light taken in early morning:
Grasshopper, 17-shot stack in natural light taken in early morning:
Braconid wasp. This is an example of a shot that is lit in the foreground with flash and background with natural light. ISO 800.
Skeletonizing Leaf Beetle (Trirhabda geminata?), 43-shot stack, natural light taken in early morning:
Ghost spider (I think...definitely a sac spider of some kind), 49-stack shot, natural light. To be clear, although it looks like the third leg on the left is damaged, it is actually just curled under the body. I would have preferred to get a stack of it with all eight legs splayed out, but it took off after this stack, so I did not get a chance.
Single shot of interesting caterpillar. Another example of mixed light. This one is at ISO 1250:
Blister beetle, single shot, flash in foreground and slave flash for background, ISO 100:
And for those who prefer non-insect shots, a 22-shot natural light stack of an interesting leaf:
