Huh? You're missing a lot. Mills started with the electrolytic cell in the early 1990s. There were various iterations of this, ultimately leading to Thermacore experimenting with huge lengths of heated nickel tubing containing H2 gas, all submerged in water. Lots of external validation. But power density was too low. Then (as I recall) Mills went gas phase. At that time he had obtained a *huge* pressure vessel, something that wouldn't fit in the average kitchen. It held rarified hydrogen and argon, deeper levels of hydrino were formed, and the stainless steel of this vessel got very not (not red hot though). Took time however. And it had to be run in batches. Too bulky, not enough power density, not marketable. Then came the rarified plasma cell which also got hot and what's more had anomalous 'blacklight' spectra and fast hydrogen. Lots of validation was done and setups were explored at a couple of universities in Europe and also at Rowan where it was funded by NASA for rocket applications for ion thrust. But again, power density was too low. Then came the nickel powder iteration, where much of the work was performed and validated at Rowan University. It would generate a short duration, anomalous high heat pulse, which did not appear to have any attributable chemical origin. This I suppose is the "canister" you were referring to. Problem was that the used powder could not be recycled easily enough to create a continuous output. Then came the CIHT cell, which you failed to mention. This was a large fuel cell, utilizing molten salts. (This is the timeframe where Mills discovered that nascent water qualified as a hydrino formation catalyst.) Excess energy was observed for months in these cells. It produced electricity directly. Validations performed. See https://brilliantlightpower.com/ciht-cell/ to see the lab prototypes. Major problem was that with increased voltage, to further increase power output, there were oxidation issues. This iteration of hydrino energy producing method was the best attained yet in Blacklight's history up to 2013. Then of course came the SunCell type of reaction in early 2014involving passing high current, low voltage pulses through various media. Lots of iterations, lots of external validation. Pardon me if I trust the dozens of validations over twenty years performed by qualified scientists, ahead of arm chair skeptics.
Lately there has been a dearth of validations, but when Mills is ready he'll have them performed, probably (I figure) on long running SunCells powered by capacitors (off grid). Who knows, that might be enough even for you, and even before the SunCell goes commercial!
You'd have to link the publications from the earlier stuff showing anomalous excess energy. They were before my time.
Any one of these devices, if real and replicable, would give Mills Nobel etc... if it worked.
It is your prerogative whom you trust, but were I you I'd trust neither skeptics nor vapourware mercahnts with dubious (paid - low credibility) scientific replication reports no-one belives and multiple iterations none of which are recognised generally as convincingly anomalous.
Trusting wonder-machine claims is generally a bad idea, since they are enticing, especially when they have continued without external validation for 20 years.