I would love to get my hands on one of these!
I see many uses for this equipment that would be very beneficial, and productive for the varied types of work I have been, and am still involved with.
I was truly, and pleasantly surprised with the inclusion of the Astro Azimuth determination function.
Being an old school Seismic Surveyor (Doodlebugger) I have literally taken thousands of sunshots for azimuth determination and rectification.
Some of the traverses I have run were over two hundred miles in length, not much in the way of accessible control along the way, and even in the good old days, helicopter time was expensive.
Knowledgeable clients would allow, or even encourage us to run leapfrog solar traverses, half the setups, twice as many points from each setup.
The motto for most surveyors who worked out west was "Shoot Far, Shoot Fast, Shoot the Sun Whenever you can."
Given the price point for the J-Mate, as well as a Triumph LS, along with a base station, and radio of your choice, it would be a very foolish decision to overlook Javad if you were starting from scratch. I do not think you could get a new, full blown RTK GNSS system, along with a robotic, or reflectorless (passive distance measuring) total station from another manufacturer for anywhere near the numbers I have come up with in my head.