Check out these clips to get a feel for this show:
I hope that they will fully explain how Wilfred is the way he is. I really hope that Ryan isn't going crazy and that Wilfred is just pranking him.
If you don't get used to Wilfred's character after the pilot you proabably won't enjoy this show.
I rate this show 7.2/10; I find this show consistently funny! The chemistry between the two are great.