Not a huge step up from Sony a7 RII internal mic
I use this on a Sony a7RII and it is noticeably better than the internal mic, especially outside with the dead cat but it's not a huge step up from the internal mic. If you need top quality audio this may not be right for you. If you just need a somewhat better audio via attaching this small easy to use device on a Sony mirrorless camera go for it. Small, easy to use easy to carry. Top quality audio, I don't think so.