I purchased my A16 new in June 2023. After 7 days of use, it failed ("Error Code 003") and I had to ship it back to Ireland for repair. I received it back in about two months.
Despite the high initial price, and the additional cost of shipping the unit for repair, and the cost of not having the A16 for a couple of months, I still do not regret the initial purchase. Plus, keep in mind, that because it was new hardware, my A16 couldn't measure PRIRs or HPEQs well (until last week), so it's been running at less than advertised capability for 7 months.
As you've already gathered from reading this thread, it is a very complicated and versatile device. Compared to what you'd spend for a full blown Atmos system - AVR plus speakers, plus other associated costs (for example, installing overhead speakers) - an A16 will deliver more functionality for less cost. You will have to either record your own PRIRs, or download others, or (best option) purchase professionally produced PRIRs, plus you'll need to measure your own HPEQ. Out of all of that you'll have a system that you can configure for essentially any virtual speaker layout up to 24 speakers, and render every common current multichannel format except for Sony's 360RA. You'll be able to compare quad configurations with side or rear virtual speakers, and be able to hear some recordings the way they were intended without having to move your home speakers around. With a listening partner you'll both be able to be in the sweet spot.
There's always a danger of obselescence with this sort of device. There are software only competitors like Virtuoso ($) or Impulcifer (free but needing measurement hardware). Sony or Apple could always decide to get into the business in a more serious way. If you search YouTube for "360vme MDR-MV1" the top result will be a 6-minute review from the 2023 NAMM show with the reporter having her HRTF measured with tiny in-ear microphones in a listening room and being amazed at the exact reproduction of the room audio in the Sony 360vme software. Eerily (and earily!) similar to analogous Smyth demos at audio shows. Currently Sony only markets expensive in-ear measurements at a few of their studios and targets professionals who want to mix surround music, but who knows, perhaps they'll market to the world (although I doubt it, since the average consumer isn't going to put up with a process that isn't going to be much better than what we use on an A16). Both Apple and Sony have personal HRTF estimation through the submission of photos of your head and ears, to be used with their proprietary software. It's also always possible that 360RA will take over from DTS-HD and Atmos as the preferred surround music technology, although at present it's only a streaming technology and it's not clear that Sony ever intends to produce physical media.
My biggest complaint and worry about my A16 is that, because it is a closed system, we are entirely at the mercy of a tiny Irish company that likely is on the edge of financial success and very much susceptible to having key personnel run over by a bus. Particularly for HPEQ files, but for PRIRs as well, there would be huge advantages to users if they would open the format specifications. Why on earth can't I tweak an HPEQ directly, but instead can only repair the ship in the bottle with manLOUD? I understand why PRIRs are encoded/encrypted - that's essential for protecting commercial producers - but why can't I fool with the contents of my personally produced PRIRs? We have a very astute user community, and promises that were made about the Realiser Exchange, such as the "merge files" capability that would allow you to personalize one PRIR with another, could likely be implemented by us (specifially, with an open PRIR specification we could compare a bare microphone PRIR with an in-ear version, and perhaps de-convolve the personal HRTF piece; for those who have measured their own PRIRs, imagine personalizing 3dSS PRIRs that you bought with your extracted HRTF and making them sound even better!).