What do you like best?
What do you dislike?
This is a start of something new - bringing Neural Networks to web browsers, which really opens a new window for experimenting. Instead of counting dislikes I am focused on the advantages it provides. I am happy with the whole experience and have no complaints!
Recommendations to others considering the product
There are much more such libraries available that helps you to play with machine learning models on browser, I advise you to please try those and experiment around them. As this things are very useful and emerging I also request everyone to contribute to such open source libraries and help the community grow.
What business problems are you solving with the product? What benefits have you realized?