No, it's not.
The point of automation is to remove the DJ.
The point of DJ software is to let the DJ apply his talent to the new digital music media.
You're application of the software seems to indicate you're the kind of DJ whose mix would emulate this software - that is to say, as far as the music is concerned you would in fact "just push play". After that it's just the same ol' song. So yes, in that case this software is a perfect clone for you at your weddings and other canned shows.
I use Ots - but not when I'm actually playing to a dancefloor. Ots is a passive solution for trade shows and jobs where there is no need to engage active dancers. It plays all day while I do something (or go somewhere) else. It's the kind of application that lets my radio friends be "on air" while they're actually at home in bed, or out partying in the clubs.
Ots is not a better DJ tool - a DJ tool would allow you to apply your DJ talent and creative skills to the file being played. Ots doesn't even provide for the typical tools and features available on Professional CD players! Ots as a DJ tool is actually a step backwards because of it's lack of active DJ features, much like CD players were before pitch control and instant start. Ots control features are best suited to people who never intend to use them.
Ots is a better playlist. It makes wonderful segues, balances audio levels, and is very stable, but the sum total of all it's features essentially provides the same experience as any other media server. It will not improve your DJing - just you're ability to walk away from the music and be something other than a Disc Jockey.
If this is the way you want your DJ software to perform - then you have set your standard only marginally higher than the free software that resides on most retail home computers.
