I think there’s pros and cons to each system. The reefbot requires you to buy and change out the reagents and takes a long time to run each test.I’ve heard many good things about the reefbot and it will test basically anything(almost) with most available test kits
I wonder why they won’t let you just pick up a bunch of discs at your lfs. I can’t imagine those discs cost anywhere near $35 to make. At least offer a discounted year supply. Better yet, it says the product should last at least 5 years before needing to send it in for servicing. Maybe include the cost of that with your subscription.