Simple install, works great, compact
There are differences with tank heaters, some of which I did not expect, such as the hot water seems to actually take longer to reach you. This is probably good for my electric bill since I am not paying to keep my un-insulated copper pipes warm 24/7. It appears to reduce flow rate to maintain output temp. My instinct was to just max the temp and mix with faucet, but I achieved improved performance by lowering it to 120 (max is 140), which allowed more flow on straight hot selection at faucet.
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In the shower, it seems there may be a feedback loop of some kind as my well pressure tank vs. cold/hot mix vs. stages in the heater vary. Sometimes it takes a while to dial in the temp in the shower... and then it drifts a bit.
In my application, I needed to free up some space, was able to install the unit 4 feet from my breaker panel, had the experience/skill to do it all myself, and had an ancient tank heater, so it was perfect. I am totally happy with the choice.