I just came back from a visit to Jitters, and it has totally changed in layout from how it used to be two years ago. The counter, which used to be against the wall on the Negley side, is now across from the main door on Walnut. I think the new layout is a lot better and more intuitive. While the space is bright, clean, and welcoming, it's quite small, only containing six tables plus a few lounge chairs inside.
I ordered a small cinnamon-cardamom herbal tea, and it was served nice and hot. I didn't add anything to my tea, but condiments and napkins can be found across from the barista's stand where you order. I also wanted a snack, so I decided to get a potato chip cookie, since (1) it looked the most appealing and (2) it sounded interesting! It was saltier and crispier than a regular cookie, but was still also sweet, and had a drizzle of chocolate icing on the top. While I liked the sweet-salty combination, I would have preferred for it to have been a bit sweeter to offset the extra salt--if there had been more icing, it would have been perfect. It was definitely different and interesting, and worth a try, though!
Before I ordered, I overheard the barista saying to other customers that she didn't know where the baked goods that they sell come from, which didn't sit well with me. (If you read the other Yelp reviews, you'll see that they come from Prantl's.) Employees should be informed about the product they're selling. Having said that, she did describe the potato chip cookie accurately, which partially redeemed her.