I was arguing long and hard with friends, family and myself about the merits of an ereader, eventually realising that the only way to make my mind up about this controversial and ultra-modern gadget would be to buy one and use it. My background - I'm not a voracious reader; I mainly read classic novels for pleasure and will buy four to five hard copy books each month.
The physical form of the PRS-300 is quite pleasing. The screen on this device is unbelievable; possibly its best feature. I've spent the last few months reading online newspapers on my Blackberry during the commute or lunch break and tend to manage fine with that, but this screen really is like reading off paper. Turning the page - nay, pressing any functional button on this device - does have a mildly slow response time, unlike with physical books. I'd seen this on display models in shops and it is sadly the same on my device, but we're talking 0.8-1.5 seconds or so, which isn't too bad. If you compare this with interfaces on other digital media devices like ipods or mobile phones (I can't comment how it fares alongside other ereaders), it is on the slow side, but in truth I haven't found this level of responsiveness to hinder the main function or performance at all.
Buttons and navigation: the menu system and user interface is well designed and intuitive. The number keys on the side aren't what you'd necessarily expect on an ereader, but it does allow for quick navigation. In fact, comparing it with the scroll wheel on my ipod, I actually prefer this as you don't have to rotate anything haphazardly to get to the right menu option. As the numbers are so useful, I hardly use the directional buttons apart from when turning pages. In terms of build and feel, the buttons are great - no stickiness, logically positioned and not too many to get in the way. The device is ridiculously light, especially when compared with physical books. In fact, what prompted me to buy this was purchasing Tolstoy's War and Peace a few days early and realising that taking this on the train, into work or travelling took up a disproportionate amount of space. The PRS-300 is smaller and lighter than most regular paperbacks, even when placed in its cover (which I also bought separately).
One slight annoyance is something which I was expecting - merely the ability to flick through, or even jump to a certain page. You can type in sepcific page numbers using the side number keys, but this doesn't always do the job. Obviously, many decent ebook files will have a contents page which allows you to jump to a particular chapter, but certain documents can require a trial and error navigation approach. For example, I have a 700-page document PDF file which is broken ito 1200 'sections'. If I wanted to get to section 530, I'd probably go to page 300 and see how far off I was, then repeat a few times until hitting the exact section. That said, the very ability of this device to read PDFs is so priceless that this isn't too significant a problem. Besdies, you can bookmark pages (either on your computer or on the ereader itself) to make navigation easier.
In fact, it is the ability to read PDF files which sets this reader apart and makes it very useful. Whilst I enjoy reading fiction, being able to browse documents for work/college while commuting in the morning is just as brilliant as being able to pick from dozens of novels to unwind on the way home. Or rather than staying late in an office, it's possible to stick the document on here and head home before rush hour. On that note, it's worth mentioning the computer software and how the reader connects with the PC. At first, I did have problems - it froze whenever I tried to disconnect the device. But after downloading the latest version of 'eBook Library' off Sony's website (the PC software, equivalent of iTunes, for this device), the problem was fixed. Annoyingly, I haven't yet worked out how to change title/author information. This means that Zola's Germinal, translated by Roger Pearson, comes up as 'Germinal' by 'Pearson' on my device and in the library. I cannot imagine ever seeing a bookspine in a shop omitting the name of Zola!
All in all, the device performs so well and is revolutionary - primarily in the fact that it can store a wide amount and variety of texts. Also, I'm fairly certain I've been reading more since I bought it. And whilst this price-tag isn't exactly budget or friendly, it's certainly decent value for money, given the quality and functionality it offers. One minor complain that buying extras such as the flip cover (though the reader does come with a nylon/foam sleeve included) and AC charger bumps the price up, but it is the same with other gadgets such as the ipod.
UPDATE MAY 2011: I though I should update this as the device has been sat on my bedside table switched off for the last six months! I still think it is a revolutionary device, but after the novelty wears off, waiting for pages/books to load up (which in some cases can slow the machine up and take nearer a minute on a bad day can get frustrating (especially if you are used to PCs and other digital handheld media operating instantly, or, dare I say it, physical books opening and having pages that turn instantly). As such, I've dropped the rating by a star. I also missed (i) browsing bookshops and (ii) having books with creased spines sitting on the shelf as a marker of the achievement of having read them.