Hard to find but well worth the wait. Someone posted in the are they ever in stock thread that BRS had availability this morning. A few of us went back and forth to keep checking and a few people actually got them in and out of their cart

Pretty cool.
If you have have an Apex already then it really is the financially smart choice. That is if you are happy with the Apex overall, it does what you want, and do you do not see yourself changing any time soon. Already having the controller means you are really only out of 600 bucks + tax if applicable. Month later you find a 6 month reagent supply for another 100 bucks and you are set depending on your testing frequency.
If you do not have an Apex or are not planning then you have a couple options. In this case take stock of what you want to do, how much you want to spend, and what is available today, possibly tomorrow, and what your time frame is. That will guide you a bit further. Two main I would consider is again Neptune / Apex first, GHL secondary. If you say you are more than 6 months out then I'd say maybe Mindstream. I'm biased though because I had an Apex already so went with the Trident.
With that out of the way here is the skinny. People bring up reagents and count that as a negative. Well, we have been using reagents since we started this hobby and it isn't going to change any time soon. Furthermore, we used reagents in our childhoods playing with chemistry sets. I'll go so far as to say hospitals are still using reagent base tests in some cases. Doesn't mean we can't move forward just pointing out that while some say it is bad and the other better it is noise. Reagents are fine.
What tests are important? Bigger question is what is important to you. Me personally I only tested for Ammonia when I cycled a tank. Never again. Nitrates - every once in a while. Ca, Alk, Mag more frequently. potassium or anything else? Nope. Of the manual tests I had (Nitrate, Ca, Mag, Alk) I only performed the ones that are the most repeatable, consistent for me, and easy (less time consuming). So...that means Hanna tests which lead me to phosphate and Alk. Not going to lie - those got done because they are easy and quick. Nyos test kit for Nitrate was also not bad but I only do it once in a blue moon.
In the end it made sense for me because it tested what I wasn't. It is affordable. Reagents are not bad. Integrates with my controller. Tests what I care for. What it doesn't I can get via ATI ICP (I send in about 1 - 2 a year). Above all it is consistent with my manual tests that I have run so believe it is accurate.
TL;DR - yes, it is worth.