It's been open and I've eaten at it on every trip I've taken to WDW,--14 or 15 now.
I'm usually there in July, Aug, but also May a couple times and October once.
So there you go.
People claim it is never open, but it does open. It closes early on days it is open, maybe between 4:30-7 or 8 depending. So you may walk by it on your way to Splash Mtn and think you'll eat there later, and it is closed later.
Personally, I think many hurry by it without even noticing it is there until later in the evening.
The food is not great, but comparable to the other selections in the area. I like some fire in my salsa, so it is way too bland for me. But it is fine, and cheaper than alot of other options. Last time I ate there was last Aug 21-31 (Don't know exact date). So that was before the name change. I don't know if anything changed beside the name.