Saw this place opening recently and talked to a couple of people at the nearby bank about it. They both told me it was similar to Chipotle. They were definitely right. While I think I prefer the quality of Chipotle's ingredients, I like the options that Zaba's has more.
Chipotle has better rice and barbacoa (Zaba's shredded beef is the closest thing), but Zaba's has better chicken and I love that you can get potatoes as well (and they're good!). Zaba's spicy salsa is really good, too. One cool thing is that if you get one of their bowls but don't get many ingredients they will give you a discount. I think a chicken bowl is normally around $7 but since I got one with chicken, rice, and cheese only they only charged $5 or so for it.
Everyone told me that Zaba's has larger portions than Chipotle, but I didn't really sense that from the bowls. Employees are very cheery despite being very busy during their big opening week. I'll definitely be heading back.