FWIW, I've just used the CineStill version for the first time yesterday to do three tanks of E6 and was pleased with it. That's 16 sheets of 4X5 and 5 rolls of 35mm. Cost is reasonable though probably not the lowest by any means at $99. I'm using a Jobo for processing - and it heats enough for the core chemistry, but for the 7 (reasonably quick) rinse baths, I needed more containers. So I'm using the CineStill in a bucket big enough to hold 7 600ML Jobo containers.
I am pleased that the results bear out what I find for most film processing - that rinse baths aren't precision time sensitive per se so much as "fuzzy", and consistency matters for how you handle all the other baths far more than mechanical precision in their timing as well. This has worked for me in B&W (D23), C41 and now E6. There are folks out there who will be better and more consistent than I for sure, but in general, "close" is good enough. Granted, I'm not TRYING to introduce variances nor condoning them either, but if there IS a material difference, I really haven't seen it - yet.