I've seen worse, though that's not to say this isn't bad - it most certainty is.
The premise is fairly interesting but, as usual with films from the The Asylum, the special effects and overall acting let it down massively. With that said, the actors are probably the most noteworthy part - I'd say the performance are, mostly, better than your average production of this type.
Natalie Robbie (Sarah), Jonathan Pienaar (Mato) and Margot Wood (Rena) are alright, while I always like seeing Eric Roberts (Horne) in a film. The onshore locations look quite nice, also.
As for the downsides, the score and pacing are two issues. Alongside that, you've got the already mentioned poor CGI but also the dialogue; which is very basic. 'Monster Island' definitely has more cons than pros, unfortunately.
Not horrific, but not at all good either.
Monster Island, a syfy original movie from 2019. Wow, I gotta say the CGI is so bad I know it isn't a movie with a huge budget but still it looks like it was made 15 years ago. The acting ain't that bad, it's slightly below average for me at least.
The story is good though I love me a good kaiju movie, especially one where a ton of monsters appear and starting destroying shit everywhere. If this was a bigger budget movie I would probably love it more. But the cheap looking graphics take away any enjoyment I might have had.
It's not the worst movie ever but I'm still not average either so I gave it one stars.