This is a great little collection of one-acts, and I got a kick out of reading them over St. Patrick's Day. I found that some of the plays were rather overly tragic, but I suppose that's the limitation one deals with when writing such a short play - you're forced to compress the action quite a bit, so that every single conflict and human emotion is magnified. (I speak from extremely limited experience, having written a couple of mediocre one-acts in college.) This worked better in some plays than in others; far and away my favorite was "The Long Voyage Home" (which, despite being part of O'Neill's "plays of the sea," actually takes place on land).
Many of the plays collected here would be great to read dramatically at a dinner party, provided that your guests are good at accents. The plays that take place about the British ship, the "Glencairn," (about half in the collection) feature sailors from all over - English, Irish, Scottish, Swedish, American, Caribbean - what fun it would be to hear their (often drunken) exchanges performed out loud.
It's been awhile since I read drama for pleasure, and reading O'Neill inspired me to make more of a habit of this, and, as a bonus, it's way cheaper than buying theater tickets.