Pros:
Free wifi internet
Good coffee (mocha latte is excellent)
Nice people
Not Starbucks
Relaxed atmosphere
Comfy chairs
Cons:
Personally I prefer live music to live poetry, but the poetry's only two nights a week so it's easily avoided. If you can make the Thursday Jazz night 7 to 9, then do it. The horn player is especially good at not drowning out the other players, with a soft touch. It's pleasant ambient while you read or surf online.
Vegas should have more places like this.