I need to be careful with this question, to avoid it becoming too opinion-based:
Given that Eo has origins in Indo-European languages, with both grammatical constructs and vocabulary, it seems to me that it's easy to learn for people with a Western background. With basic competency in German, English, French, and Latin, I can guess the meaning of many words I have not encountered before. And the grammatical structure is also familiar.
How does this work for people with a non-Western background? Do native speakers of Chinese or Korean (or any other non-Western language) find it harder to learn Esperanto? Is the grammatical structure/morphology a problem?
I would be interested what aspects of Eo are hard/easy for such speakers.