I tried to make an equipment booking system. My prompts were relatively solid, sometimes the results were decent, other times Greta ignored my prompts and delivered something semi broken. I often used up credits on edits where Greta simply didn't implement the required changes. The key to this is starting with a really solid prompt, rather than trying to edit it continually. Exhausting the credits can be frustrating, I have already used 300 without anything that's workable yet. Probably 70 of those credits were requests for edits that were never fulfilled by Greta. This is very promising software, but the credits system has to be improved. Perhaps if edits aren't made properly a roll back function can replenish them. There has to be a way for this to work that's fair for Greta and the user. I'm on the fence about refunding, but I'm going to give it another chance for a week to see if I can get a workable app out of it. The developer seems like a very committed guy so that is always a plus.