It's about the size of a desktop computer. The biggest drawback is it has to be within 1 meter (3 feet) from the tank/sump and RODI reservoir. Hopefully this can be addressed.
I think I'll probably check alk daily, Ca, Mg, NO3, and PO4 weekly. There are only certain test kits that work with it (mainly those with liquid only reagents), but they are testing more out as well as piloting some test kits with powders (RedSea Ca). So far I've tested Salifert alk, API Ca, and API NO3 and have gotten good agreement with my manual testing with Hanna alk, Salifert Ca, and Salifert NO3. I'm waiting on RedSea alk, Mg, and Giesemann PO4 test kits to arrive. The tests take a long time to complete (~40 min per test) so this is not something you would use if you needed the results right away. It would be good to use on a schedule (like at night) or remotely. You are also limited to 8 vials at a time and each reagent uses 1 vial. So RedSea Mg, which has 3 reagents, would use 3 vials. Not sure that one will be worth it. That being said, it does come with 12 vials, so you could keep 4 vials on standby and swap them out when you want to test that parameter.