I love the laid-back, lazy vibe at Kasbah. The outdoor patio is a great place to hang out with a hookah or a pot of mint tea. The night we went there a solo singer-songwriter and a belly dancer provided some live entertainment as well.
My roommate and I both had falafel sandwiches ($5.75 a piece). At first they told us they'd run out of falafel, but when we got up to leave, they offered to make us some falafel fresh on the spot. It took 20 minutes or so.
As such, we had the falafel at its peak. I liked the flavor on a whole, though I think the falafel pieces could have used some salt. The pieces had an interesting texture---kind of crispy, but with something closer to a french fry-style crunch, rather than the harder crunch you get at Mamoun's a block down the street.
The wholewheat pita was a nice touch. I hate white flour pita so kudos to Kasbah for not stooping to the lowest common denominator.
On the other hand, the lettuce, tomatoes and cucumbers in the falafel were terrible. They were those cafeteria-grade vegetables that have a sickly color and taste more like watery cardboard. The low-grade veggies made what could have been a great sandwich, a decent one instead.
We also had a pot of mint tea ($5.35) which seemed overpriced. That said, they'll refill your pot with water so you can get a second steep. Each pot gives about 5 small cups.
In conclusion I think the falafel here is competent but has room for improvement (namely, salt and better vegetables); at $5.75 it's nearly twice the price of Mamoun's or Aladdin Crowne, but you're getting some ambience with your food.
Note to my fellow vegans: none of the desserts here are vegan. For shame, but not unexpected.