i'm almost a year in, i love it. nano texture is so good.
I use it daily but not heavily because I also use several computers and other equipment. Not full time drawing like some. I am super careful so I am not sure about others, but I also work in an environment ripe for bad things to happen to tech products...I am a designer and a machinist so I use my iPad to make sketches and annotations on designs and operate metalworking machines to produce parts, sometimes in the same space if things are busy.
I have to make sure to keep steel dust/small burrs out of the closure areas of the iPad. I don't use my iPad directly in the machine shop if I can avoid it but I do go back and forth between my studio the shop a lot. As an example the entire upper edge of my MBP's display has magnetically drawn thousands of tiny steel shavings to it, and I regularly use gaffers tape to gently pull them off.
I was concerned about the keyboard wearing into the iPad's screen. So far nothing. I have travelled (flown) 4 times with this iPad, taken it on the train a dozen times perhaps. Usually carry it in a Waterfield messenger bag. I make an effort to avoid squeezing the iPad in its case, and if I am putting it somewhere where I think it will be squeezed I use the folio style case instead of the keyboard case. It's a bit more weight to carry an extra case but sometimes I prefer the folio such as when I am reading music.
I was concerned about the various oils that I often have on my hands (from the machine shop, not choir) affecting the o-ring that runs around the keyboard but so far so good. Mechanically speaking it is straight in the line of fire so I gently place my hands on the keyboard and make sure not to drag them across the o-ring or (allah forbid) pick at it absentmindedly. I thought the o-ring was critical to keeping the display safe but frankly the display seems to tolerate the keys just fine.
I use the apple polishing cloth every few weeks if I get some spare time. I have not noticed a single blemish on the display nor keyboard in this time (except the usual polished spots on high use keys). This was an incredibly expensive iPad but almost a year into owning it I have yet to regret balling this hard.