I am a big fan of Narco series like Narcos, Zero Zero Zero, Gomorrah, Suburrah, Narcos Mexico... So consequently I am always up to a add a new series to my collection. Marbella is an interesting product. Not original and full of cliches but still entertaining.
First, if you love similar series, you're going to enjoy this one. The cast is pretty good (Even some of them are debuting here), the settings are great and the script is acceptable even most predictable.
Second, music is cool too. Pretty good mixes including old and new remixes. To add, camera work is great and action scenes too. Not a big amount of cheap CGI what is great, and visually it doesn't look cheap.
So, overall if you're up for an entertaining 6 episodes Narco-Spaniard-Marbella world, this is for you. Put your expectations on the right place and enjoy.