It appears to be well written and quick, but what sets it apart is the interface is well designed - unobtrusive but presents pertinent information concisely. The internationalization support is impressive. The free version is fine for all I need, but the cost is so reasonable for the work that clearly went into it that I upgraded anyway.

One suggestion for enhancement, if the developer has time and interest: offer a choice of weather sources, I find that the one used (darksky.net) is not as accurate for my location as others I've seen, it would be nice to be able to choose another.