You can put me in the yay Sony camp too - never had any serious problems, when I have, I've had good responses, but most problems have been down to me and my TechDunce status.....
And the devices are well made (the 650 & 350's, if you can get any, are still a superb piece of engineering - that works.) and I agree with MatW and others, I like a dedicated reader that is designed that way, and for that purpose, not a jack of all trades.
If you must have a multifunction gadget, you don't want a dedicated reading experience.
And, although I swear by, and am never without my Swiss Army knives (one in car -the big chap! - one on bike, one in kitchen, etc....) the saw is not big enough to cut a tree down (well,easily, anyway), the pliers aren't big enough for large nuts, the file won't get you out of prison (well, easily, anyway) ...... I trust you see my point .
(Speaking of which, the knife blades, incidentally, are suitable for almost everything !)