I've had the Nexus 7 for over a month now. Bought the Kindle Fire HD 8.9 for my wife for Christmas so no feedback on that one yet.
I opted for the N7 because of the built in GPS. Bought the KF for the wife because she ain't getting any younger and I figured the larger screen would be easier to read.
Now, I'm using my antique laptop to type this. I also have an Acer netbook. Haven't turned that on since I got the tablet. I could almost live with just the tablet if it weren't for the lack of external inputs. No CD / DVD and no option for SD card limit the tablet. But for reading, listening to music, watching video, light internet surfing and words with friends, you can't beat the N7. Also love the GPS.
I bought a blue tooth keyboard / cover for the N7 and that over comes any typing issues. Picked it up on Ebay for less than $20 shipped.
HTH, Dennis