I wrote a rather harsh assessment of the original Brahma microphone, which you can still read here. However, I should make it clear that this version is no longer made.
The Brahma microphone has been further developed, using the same capsules, but in a new body, and manufactured in a different place; the calibration has also been further developed.
Details of the new microphone are now available on a new web page: Brahmamic.com
The new microphone is available (as before) built into a Zoom H2N recorder:
And also as a separate microphone (which is more conventional-looking than previously):
Future developments include a version with larger capsules (for a quieter background), in both Zoom and (later) stand-alone versions:
An eight-capsule microphone similar to the Core Sound OctoMic for (almost!) 2nd-order Ambisonic recording is also under development; this photo is of an early prototype and may not represent the present form:
Here is a more recent photograph, which (I think) shows that the capsule arrangement has been changed to be the same as in the OctoMic: