I LOVE Jack Flaps. It might be my favorite restaurant in Cleveland. Service is always super friendly, attentive, and quick, and the food is amazing. My mom and I love to go for happy hour on Saturdays, when waffles and flapjacks are $5. It's an absolute steal, and makes it so that you don't have to decide between your favorite on the menu and the new seasonal specials - GET BOTH! Breakfast burrito is incredible (and try the hot sauce, trust me), and my favorite waffle I've had has to be the carrot cake (which is seasonal).
If you're not adventurous, the original buttermilk pancakes will probably be the best you've ever had. Not an ideal spot for large groups, but that's part of the reason I love it!