Having tried just about every application of this sort for OSX, I can say that this is easily the best.
The very iTunes-like interface is attractive, intuitive, familiar and very well executed. This is genuinely iTunes for your DVD collection. Unlike iTunes, it is written entirely in Cocoa, and as such, theme-friendly for GUI nuts like me.
The interface is customizable, and able to display as little or as much information as you like. Typically, the main window displays basic info such as title, genre and rating, and a slide-out drawer caters for the rest, including such info as full cast, release dates, and even plot summary!
The search system wisely combines information from both IMDb and Amazon to retrieve the most accurate results. A common flaw of other similar applications is that they only use one source or the other, meaning IMDb based results lack information such as price, and often have unwanted artwork such as theatrical posters rather than DVD covers. Similarly, results garnered only from Amazon will lack in-depth information on cast, crew and studio. The devoper has acheived the perfect combination with this search engine. DVDs can be added quickly and effectively, complete with all the information you could ever want.
My fellow Europeans will be glad to hear that the preferences are well thought out and thorough, offering many options to default to European standards of Region 2, PAL, plus of course the abililty to retrieve results from Amazon.co.uk rather than .com. For the first time I have been able to add DVD after DVD without worrying about changing the artwork or technical DVD data.
There are still a few minor bugs that need to be ironed out however...
This may just apply to British prices, but my value statistic in the status bar constantly says -0.00, even though all my DVDs have valid values. Also, even though I have chosen a preference to exclude "wishlist" DVDs from the main library, they still remain there - even after restarting the application.
These are minor glitches however, and shouldn't distract from the fact that this app is SLICK, PROFESSIONAL, VERSATILE, AND VERY USER FRIENDLY.
Definitely worth $18 of anyone's money. I wouldn't complain if it was $30.