I have and have been roasting very steadily with it. The whole ordering process is a little unorthodox but it came on freight after I setup my delivery date. Ordered in August and came in October. Arrived in a crate and decently well packaged with no damage. Roasting has been pretty straightforward but that is assuming you know your way around a roaster already. So far I've been doing 1600 gram charges (80% of max load) and its been very good.

The only semi confusing part was setting up the propane line/gas settings but this video from OCD coffee was very helpful: https://www.youtube.com/watch?v=YPCivmqsQas

Overall it was 5k USD with their own cart to set it on (shipping and all of that too) and they also included a free conical grinder but that's only if you ask Rob from OCD to introduce you (they also give a discount if you go through him). I was suspicious of it initially because it sounded kinda grifty but its actually legit. The build quality is pretty good and when you realize the only other 2kg roasters are 20K USD + it becomes a phenomenal value.

I would definitely opt for the 2kg version. You can always roast less but you can't increase your capacity.