After using a device without a home button for the past 2 weeks, I don't miss it at all.
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I also bought a note with my upgrade and almost went back to the store to return it, but I stuck to my guns, learned the operating system, and now after 2 weeks it does everything I need it to. I wouldn't part with it now, and the Iphone4 is on Ebay. Getting rid of the iPhone was actually difficult because I really liked it and actually felt some weird sort of attachment to it because it is an Apple device, and I have a home full of Apple devices. I agree that it is just "easier" to stick with the iPhone because of the Apple ecosystem, but also found out that my Android based Note connects to my iMac just fine, and I even am able to transfer my Itunes library to the note intact.
The iPhone is definitely simpler to use, and is probably better for the person that doesn't like tinkering around with techie things.
I'm surprised you would return it for the 4s though, with the iPhone 5 right around the corner. If I wasn't happy with the Note, I was going to return it and get my upgrade restored, and use my iphone4 until the 5 comes out.