Kol Hakavod for this review, liked and subscribed! I am a guitar player who wants to keep his mind sharp (I'm 64) by learning a little piano. I think that I narrowed down my choices to Casio CT-S1 and CT-S500. I like the simplicity of the CT-S1 but don't like the lack of screen. The CT-S500 has a lot of features I probably would not use but I like the display screen, rhythm accompaniment and it just looks nicer. Be safe, Am Yisrael Chai!
Nice review. The latest firmware provides interesting possibilities for use as a hands-on sound module if coupled with a nicer keybed such as the ES-8/920.