Much better than I feared, not as good as I'd hoped.
Major props to the art department of the film, the movie looks great and the CGI was really well-integrated. Scenes where characters and dinos were interacting in closeups looked really nice and it actually felt like an actual creature was there and getting touched, not just a green-skinned thing that was replaced later. I think some animatronics were used, but it's hard to tell.
The premise of the new bad dino is also cool, turning living creatures into products to be marketed and focus-group tested. The Raptor-Squad was a very cool idea as well, but depending on how much you're willing to suspend your disbelief, you might be disappointed or think its silly.
In the end, the moral remains the same though: Don't mess with nature. I was hoping for a Jeff Goldblum cameo and him going "How many times do I have to tell you 'I told you so'?" but no luck there.
Which is also where the downsides start: The plot is very predictable, especially if you've seen the trailers. It's pretty obvious after the first 15 minutes who will live and who is dino-grub, with one exception IMO. While the characters are likeable, especially Chris Pratt as Owen, brothers Zach & Gray and of course Dr. Wu, the rest are not quite as interesting.
Pictured: The deepest relationship in the movie.
The other thing that bothered me a bit was the comedic relief. In the end nearly every action-scene was followed up with a funny one-liner or reaction. The first movie had those scenes too, but the difference was that the characters were playing it straight and in character in that film; here it feels forced because there is just way too much of it, which takes away from the suspenseful scenes and a lot of times feels out of place considering the situation the characters are in.
Overall I really like the movie. It's a fun 2 hour adventure film, but if you prefer to wait until it comes out on DvD/stream, you're not missing anything by not seeing it in cinemas. I would rate it equal or a little higher than Lost World, definitely better than 3 but not as good as the original.
There can only be one king after all