I'd say there's still some things related to tasks which they can improve. Otherwise my experience has been really smooth
some time it take too long to accept a task :/
Gamehag is really the best site as far a credits / tasks ratio goes, but I had some experience with tasks from wall offers that just didn't pay you 
in 3 steps
Choose the game that interests you and play itfor free.
Every game has some quests for which you will receive Soul Gems.
You can exchange your Soul Gems for Steam Wallet top-ups, game keys, CS:GO Skins and other rewards.
You know that on Gamehag you can get real rewards for free, right? Join us, complete walkthrough and get your chest!
How are things going for you new and old users Is the flow satisfying or are there some points and elements that bother and frustrate Give your thoughts and opinions