Pretty good in all but the UI
I’ve only used this for sftp transfers and although most of navigation makes sense the async transfer system is difficult to understand and operate. It’s hard to select files to download. Uploading is even harder since it doesn’t access your iCloud files, only local and finding where your local files are isn’t straightforward. The progress is hidden from view so you never know if the up/download was successful or not. Another thing that’s irksome. You can’t edit server configurations. Once you set up a server and it’s wrong, there’s nothing you can do except enter a new one. Very annoying!