Narrow monospaced font. Based loosely on the original VT220 font.
The characters are on a 5 x 12 size ratio (as 80 columns by 25 lines would fit on a 4 x 3 ratio CRT). Over 1050 glyphs in Latin-1, A, and B, Greek, and others. Private Use area contains C1 control symbols, special VT100/220, Commodore Pet, Atari 400/800, and TRS-80 Model 1 and 3 characters.
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Pros
Pro Great looking retro font.
I use 18-point DEC Terminal Modern for interacting with OpenVMS systems, with anti-aliasing and subpixel anti-aliasing. With a dark background and a soft white, amber, or green foreground, it's very reminiscent of the physical terminals, though I don't actually have one for comparison.
Unless you want an ultra-retro "rasterized" appearance, I would recommend it by far over either "Glass TTY VT220" or "VT220-mod".
A very slight "con" is that it doesn't work well with at least some of iTerm2's built-in Powerline glyphs. Spaces appear as filled blocks, for example.
Pro Interesting look
The look of DEC Terminal Modern is somewhat retro-inspired.