Awful. Every time.
First, it's hard to hear the person on the speaker. Or at least it was when I have gone. And I've gone more than a few times since it's close to home.
I have never been satisfied with a single experience here. Either my order was wrong or they ran out of what I wanted or it took a century to go through the line.
The last (and I'm convinced it was actually my literal last) time I went, I had spent the day hearing over and over about their new bacon burger on the radio. By evening I had decided to give into marketing and temptation and try it. Got there, waited a gosh darn eternity before I could even order, and then actually finally ordered.
They didn't have it anymore. Did they run out? Did they discontinue it (no)?, did they forget how to assemble it? No idea. But they told me they didn't have it anymore and asked if there was something else I wanted. There wasn't. So I spent a lifetime in line, and drove away with nothing.
Combined with my other bad experiences, it spells the end of them getting my occasional business (which clearly they weren't trying to keep in the first place, so no loss for them I guess).