I am personally using Reeder on my Mac. http://reederapp.com/ and planning to buy its iPad app when I get my iPad. It is because it integrates with Google Reader very well.

The reason I use it is, Google is doing RSS aggregation really well. It is robust, fast and gets the pubsubhubbub pushes really quick so that I can see new stuff in seconds.

I think this app can be great with Google Reader integration, because it has a better UI than Reeder for iPad. But I think many people don't trust adding hundreds of RSS feeds to a mobile device instead of a cloud-hosted service (Google Reader).

Good app, you're doing good.