I've said this about Allen's short stories before - there is an innate, uncontrived emotional intelligence to them. It feels like you're sharing something intimate with the author about himself, such is the feeling of honesty in his fiction.
Yes, you were right there is a "but" coming! Allen's work is downbeat, sad, melancholic. There is little or no joy to be found here, but isn't that realistic - like the daily grind of life sometimes? It's an arguable point and it's perhaps one reason his work is a bit like marmite. You'll either love it or hate it.
If, like me, you see beauty in the melancholy lyrics of Nick Cave or you understand where Cohen and Waits are coming from then you'll get the brillance here and give it 5 stars like me.