I found Coffee Tree Roasters on this Thrillist...

https://www.thrillist.com/…/the-best-coffee-shops-in-pittsb…

...and since it was not far from the new Starbucks in Amos Hall, we dropped by first.

From the moment that I walked in and saw the row of Bunn brewers, I suspected that my experience would be lackluster, and I was right. The light Guatemala brew felt burned as soon as it touched my tongue, and even after it cooled down, it tasted too dark for my taste.

I actually had to give this single origin a lower score, just 6.25, than the blend that I'd had earlier at Hebrews.
I see no reason to return, not with all the other coffee options in Pittsburgh.
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