I've had no issues with with running multiple intensive tasks.
It does heat up a little more than the macbook mini, but not by an amount that would worry me. The little fan at the bottom seems to do a pretty good job.
Coding is so much more pleasurable on my 24 inch IPS dell monitor than it ever was the laptop. I also know some developers who swear by their 28 inch screen monitors.
I was using a Thinkpad for about 8 years before I got myself an Intel NUC (i7 processor, 128GB SSD and 16GB RAM) for a total cost of under $800 (if I recall correctly). The Intel NUC is literally half the size of the Macbook mini and was a breeze to put together.
Then Spidey sense tingled...
Looked at your profile, then followed your last submission to product hunt and found out that you are the Founder CTO at guaana.com. Co-incidence?
Next time please do put a disclaimer and definitely do not try to "Growth Hack" HN.