I like how easy it is to use, all you need are basic skills in coding (HTML/CSS) as well have some knowledge of JS libraries such us react or VueJS which makes development easier for beginners.
It's free service so there isn't much we dislike about this platform at least not yet! Maybe if they had more integrations with other tools that would be great but currently nothing. We're using Wao mainly because when our website was still growing its stats were very helpful compared to Google Analytics API where data can only show up after hours while waos shows daily statistics even during business day. Also since everything has been set-up by me myself time taken to learn basics wasn´t really long neither did i find any difficulties understanding what each feature does.