C200CDI W204 needs some power - Spider unit?

[Reno]

Hi
I got 2007 C200CDI and i wanna get some more power, nothing extreme
its just that 136HP isnt enough

i wanna do some basic stuff first to get the most bang for the buch HP

so i was thing about tuning box as first,
did some search and i see the spider tuning box got good reviews

does anyone here have that unit and can share some opinions?

what else can i do with the car to get more power

i wanna get it to 200HP~