Just converted a small MVP app made with @lovable_dev into a NextJS app using @cursor_ai agent mode with Sonnet 3.7 Max. It went smoothly and took around 10 minutes, with some correction back and forth. It could probably be a one-shot with correct prompting, I used the most basic prompt. I would say this is awesome, Lovable for crafting awesome UI, NextJS if you need quick prototype with backend included. And all ruled with Cursor.