Yes, I have (and still do have experience) with Ms. Popovic. Flipping through co-clients on Twitter, she's also made a sale to Harpercollins & I think to one other big five, though I can't find it at the moment.
She's a very editorial agent (something I wanted/preferrred) and I've only had good experiences with her. The novel she took me on for (YA SF involving a semi-generation ship, murder, and aliens) didn't sell. The second is on sub at the moment.
PM if you have more specific questions.
ETA: Forgot to add congratulations on the interest & call!