I decided to go ahead and buy one because the Pros outweighed any Cons I could see.
Generally, I take extremely good care of electronics, even without cases (my iPhone has had no case at all for just under a year now), so it being easily breakable is not a huge concern. I can see how people would say it could easily break being so light, thin, and small, but that is the hand off you get when buying a device where you see those as Pros. Still, because this is not something I'll keep on me as much as in packs or tossed into the back seat of my car, I got the leather case too. I was considering trying to use my iPhone as an eBook reader too but at some point you have to recognize the limitations of devices
Its just too small.
In my case it comes down to how I travel above all else. I hit the road with my desktop computer, flat-panel monitor, and all accessories, my laptop with a few accessories, multiple pairs of shoes, about 7 days worth of clothes on top of the few extra things I leave at my apartment (so 1 suitcase and then a bunch of hanging shirts), a bag with the Wii and all accessories, and a separate bag with a balance board. It takes me about 4 trips involving a flight of steps back and forth from my car to get everything into my apartment, unless I have already dropped the desktop off at work in which case more like 2-3. This doesn't include all the shopping I usually do before getting home so that I have food for the week which is another 1-2 trips since I'm pretty good being able to grab all the bags at once.
To have to carry a few books in a box or bag in all of that is just not appealing whatsoever. Already I'm about to bite the bullet and start using the laundry room on-site at my apartment to not have to deal with moving clothes back and forth.
Plus, to be honest, I like to read but I'm not a bookworm, so I don't think I'll be filling this up with 50-100 books (you never know, I guess).