Overall, Coinbase is reliable but there is room for improvement.
For example, instant buying through cards don't go throw 9/10 times so you have to use bank transfer which can take 1-3 days and by then the Coin prices have changed. Another downside is that they didn't actually pay out the "refer a friend" bonus. The referred friend got his bonus though so at least it's something...
For people who are just getting started, Coinbase is a trusted exchange and despite the limited Coins offered at least you get a good start without getting ripped off.

The reason I think thatsucks.com is the best anti scam site is that:
1. They never promote any easy money schemes such as robot traders and other scam services.

2. When they review brokers, they let us know about the terms and conditions, especially if they are unfavorable. Such as bonus terms so you know what you are getting yourself into. Also, they mention regulation and warnings from authorities towards the brokers!

3. There are both negative and positive reviews from traders themselves below each review which means thatsucks.com does not remove bad testimonials but rather allows them. Most other websites always remove your negative comments!

4. The website comes with a forum named "CommuniTraders" so you can get in touch with actual traders and actually learn from them and get their unbiased opinions.

The people behind this website promote lots of scam. From binary options "easy money" schemes such as robots and autotraders to scam brokers.
They trash one scam robot but then promote another scam themselves.
The comments on their site are also fake. The negative comments from people getting scammed by the services they promote are always removed.
Don't trust anything published there.