Is planhub have good reviews?

Hey i just found this website .Does legit and do they have good reviews?

Bravo Telecom (internet and IP phone) asked its customers to post reviews on PlanHub for a chance to win 3 months of free internet.
You can guess the result. Bravo’s rating on PlanHub went from 3.5 stars on May 24 to 4.3 stars on May 27.
You can also guess the usefulness of the reviews written by people who want to win 3 months of free internet.
I’ve used PlanHub only to find an ISP. I wonder if any mobile phone vendors have used such a tactic?