Well that really depends on what kinda room you plan to heat and in what country

If you plan to grow tulips through the winter then you might as well get a few of these

Jokes aside: heats up the room quite fast. Regarding quality - no concerns from my side - European assembly and quality components are noticeable.
Hah! Nicely put!!

But the new models are appetizing, gonna think about it. I agree what you said about quality, the macjines do some excessive heat but mine never turned off because of that or anything like that... If your zeus shows some issues let me know, kay?