Ganpati Builder Heights delivery promises are a total joke?

Is anyone else seriously worried about Ganpati Builder Heights' project delivery timeline? I'm looking at a 2BHK there for investment, but heard some rumors about delays. Honestly, my main concern is the project-delivery track record. If it gets delayed, my whole ROI calculation goes out the window, right? I'm trying to figure out the actual possession-timeline. Did they even register the phases properly with RERA? I can't seem to find clear dates on their portal, which is making me pretty nervous. What's the point of investing if the builder can just drag their feet for years? Has anyone here invested or know someone who has? What was your experience?