Very, Very, Very, Very Impressed.
My review is based on a simple product comparison model which I can use for Organic Search or PPC.
I've been struggling with review sites using some software called reviewsPRESS - which has around 5% of the features WPreviewengine 5 has.
It took me around 10 mins to install WPreviewengine 5, activate the plugin and theme, then 10 mins (getting banners and links) to have my first review up and running - with 3 ratings categories. No other configuration was needed to get to this stage - the site looked good and I could have just kept adding reviews at this point. It was all self explanatory, no searching was needed to find settings.
What more could you ask for for an out of the box solution?
I do not code - so I find any code edits taxing... but there are non in WPreviewengine 5, everything is editable in the admin area. You can even edit the layout of the pages and posts by using a simple tagging system which takes around 10 seconds to figure out

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My site was using the one of the supplied themes and made it very easy for adding a post icon or screenshot of the site, reviews, but there are lots of options for embedding the reviews into a 3rd party theme (my next task) which seem straight forward and was surprised to see about 20 options for different "Call to Action" buttons - which saved me some Photoshop time - I just used one which matched my sites colors (which I'd changed), the rating stars also have several graphic options and you can edit virtually every piece of text (I say virtually as there may have been one I missed). Dive in a little deeper and you can even change the css of the ratings box, star rater, comments, comparison table... everything.
All of the above make it extremely quick and easy to get a review site out there in minutes. You only need to visit the admin area to make each site look and feel different in appearance to site users and search engines.
I was impressed with the auto-gen comments - you do have to think of some random comments (but a quick search online gives you some ideas, and if you make your own database of these - they will be reusable on other sites) - the only comment I have on this area is the Random Dates - maybe a date picker would be handy - there is a button to complete with todays date, but it enters in both the to and from fields, I had already enter the from field and this was overwritten - so all my comments were from today - it caught me out a few times.
WPreviewengine 5 also comes with a Link Cloaker - which works well and saves time installing more plugins - nice touch
I haven't even used or investigated half of the features yet, such as googles hReview "Google parses the hReview microformat and uses the data to populate search results page." (first time I had heard of it) - WPreviewengine 5 automaticall embeds hreview elements in the posts - which can only be good - again you can turn this on or off.
I never touched other items which you can integrate such as Google maps, Zip Code radius search (us only) - or the CSV import (not applicable to my site this time) - but I already have a plan for those.
All in all I'm extremely impressed. Less than 1 hours work and I have a pretty cool review site up and running.
Installation: 10/10
Simplicity 10/10
Configuration 10/10
Usability 10/10
Results 10/10
(it has also prompted me to write my longest post ever!!)