I don't think that's an insulting review at all. (Maybe you use the word "insult" differently than I do?)
He seemed objective and reported what he found. His print quality (with the cat) did seem lower than I'm seeing, so maybe that's just a bad roll of filament. It didn't seem like he dug very far into why he didn't get better prints, but he did report what he found with the default setup and the roll of Flux filament.
One thing he highlighted that has always bugged me is the lack of a heated bed. A heated bed would make this printer so much nicer to use. That said, my Kickstarter Flux didn't come with that magnetic print surface he has. I've tried BuildTak on my bed, but it isn't perfect without heat either. It looks like the magnetic print surface would be something nice to have (I'll look for it on the Flux store). I'd love to get rid of tape & glue. Yuck.
He mentioned that the auto-level feature worked well. I've seen the same. That works great.
He doesn't try out the other heads, but many users probably won't find those that useful. The laser power is very low, so it's of very limited use. Putting a pen in that head is entertaining once or twice, but that was about it for me. The engraving/laser/pen area is too small for many projects, so those are also things that will keep people from being excited about the other heads. He didn't report on the scanner, but that's probably a good thing. I've never been able to get anything good out of my Flux's scanner.
He very quickly compares it to the Prusa i3 Mk2. I have a Prusa i3 clone and think that's a worthy comparison. The price is fairly similar. It's definitely not as pretty of a design as the Flux, but my Prusa gives much more reliable & consistent prints than my Flux (E3D V6 hot end, heated bed & BuildTak -- it works perfectly almost every time). Because of those things and that I can print PETG on my Prusa, I use my Prusa about 95% of the time instead of my Flux.
The section where he talks about the filament holder is completely valid. The printer looks great with the lid closed and Flux filament. However, buying only Flux filament doesn't work for me. I printed this external filament holder and it seems to work OK: http://www.thingiverse.com/thing:1515792
Anyway, I think if the Flux could support other filament materials (like the 250C needed for some PETG filaments) and had a heated bed, I would use the printer a lot more. It might even become my printer of choice.