I bet the posters who are questioning Riera have actually never seen him play. Also willing to be that they are the types who will only ever be satisfied when the club is linked to a big name that they actually know, for lots and lots of money.
Some people never learn.
You have no right to question anything Martinez does up until this point. And bringing who he bought at Wigan into the argument is not even valid either, as Everton and Wigan have different pulling powers, wages structures and are chalk and cheese, despite him still managing to do something with them that Everton have not done for 19 years and actually win something.
Chill your boots, as one poster said, "Bob's got it covered".