Loved it.
I was intrigued by the world building since the beginning and even though it was a bit hard to follow at times, I was still caught up in the story.
I think what I missed the most was a good romance, I honestly enjoyed more the relationship between Leto and Jessica than Paul and Chani, which was pretty superficial, we don't really get to see how it develops because theres a time jump right in the middle.
Also would've liked to see some diversity in the female characters, most if not all of their development surrounds having kids, being mothers, getting married... so yeah... 
Nonetheless, I am excited to read the next one!