Thenoobie...
I don’t get the subscription argument. You need to buy reagents for a Trident...MindStream just sends them automatically. Yes, MindStream reagents (subscription) costs more than Trident. I am choosing to pay more for the MindStream because it measures 10 things instead of 3 and because it measures every 15 minutes. You also need to remember that the Trident needs to be serviced every few years while the MindStream does not. I will not argue that the MindStream will cost more that a Trident over time but I think it is worth the extra cost. I also like the fact that MindStream has no pumps, hoses to kink, calibration, or priming. I have not seen one in person yet but guess that it makes no noise either. I think it is a much simpler unit for the end user.
All valid points. The correct answer is it will come down to what the hobbyist is willing to pay. About the best answer to it is cost per test. Even then it is going to vary by hobbyist because some will want more and others less. What we do know is that:
MS = subscription for discs
MS = 35/39 per disc per month
MS = currently unknown maintenance
Trident = paying for Reagents
Trident = 45 per 2 month reagent supply (lowest test per day est)
Trident = self service 18 months cheaper
Trident = return to vendor for service 18 months more
Someone has a pretty good chart, graph, or breakdown somewhere on this site. Basically it comes down to what you want tested, the frequency, etc. Do you want only 3, do you want all 10, do you need them all, etc. All things one must consider. Also MS is about a 6 - 8 week window while Trident is still unknown based on the current waiting lists out there.
I personally would pick MS today if it shipped different discs with tests and lower costs. Think of the Netflix subscription concept. I really do not need all 10 of those tests and if I already had a controller then I'd have pH, ORP, temp, and probably salinity. So get the disc cheaper and I'd jump in.
Trident, well, the longer they delay getting their supply chain worked out the more products come out which means more choices to stew on.