I had one. awful blinking thing, just wasn't weather proof and in the awful summer we had last year, the food would just get wet, full of slugs etc. horrid to clean out as well-very difficult to get all food out of and of course, when food gets wet it goes mouldy so I was doing it all the time. threw it away in the end. might work somewhere dry or in a covered pen alright but no good for rain at an angle.I also had to bungee the lid on as the slightest breeze meant it would come off.
small wild birds can still feed out of them, after having one I can't see how they are mouse proof tbh.