Adsense approval is a little tough task, however, if you have good traffic its not a problem, keep in your mind that you must have genuine organic traffic and must not click on your own ads, which may result in adsense account suspension.
I am waiting that my blog takes 3 months to apply the AdSense. Right now I am using infolinks to monetize my blog. For me I would pick that infolink is better because they easily consent your application when you are qualified.
I have never used Infolinks, but I do have Adsense ads running on my forum. I have had a pleasant experience with Google's program so far. It is certainly reliable and reputable.