I like it a lot. But by saying that, don't get confused by the overall state Rust GUI applications are in: immature[0]. I have a background in native iOS and macOS development and this is another game. However I have not regretted choosing Rust for this project. I wanted to natively support both Windows, Linux and macOS and at the same time learn the language. This was my first proper Rust application and I've learned so much.
The limitation Iced has have actually done something good for the simplicity of Ajour. People are liking this simple look because the application is just a tool. There is no need for fancy animations.
After looking it up and finding iced I'm curious too. There are so many GUI frameworks for Rust but I never have heard about iced before - looks promising though.