I'm a backer. I actually prefer the dock, since it's much more compact than the adapter and a stand, which would have been the alternative, and a far less convenient option at that.
Can't say I'm very happy about how the dock ended up looking though. I was actually starting to think I would never receive my SFANS, since they haven't updated their page in months (and they promised to update it once a week) and everyone in the comments section is pissed off.
But seeing as some people have received theirs, there's still hope.
I guess they were running low on money and went with a simpler design to save money.
Well, it's still functional, and it's not like it's any uglier than the official dock, I just hope I receive it at all.
If you open the back door, there's actually an air hole there for air to get through. I assume fresh air would still come in through the hole for the cables even if the door is closed, although it won't be optimal air flow. I still worry about my Switch getting hot while docked, it's already bent and I don't want it to get worse.