I have had a macintosh for about 30 months now, and have been using dekstasy since very early days. This is my first review - I am not really qualified to do this review because it is the only mixing program I use. I tried several others - not including traktor. The two whose programmers were in a dispute about who created the skins? I didn't find either any good. I am completely satisfied with dekstasy and I use it (alongside Wiretap) to:

-make a speeded-up or slowed-down version of a particular tune.
-just mix two songs together.
-do proper mixes (my longest so far has been 3 hours 13 minutes).

Downside -- you have to analyse the bpm of every tune you intend to mix, beforehand. I found it very easy to learn, but it will take a long time and a lot of patience (the documentation is quite extensive but I didn't really rely on it). However, this means that (if you've done it right) things will never ever go out of sync when you are actually mixing. Doesn't that make sense? It has got nothing to do with real decks. (I was never that good anyway...) (And I bet you aren't either. Do yourselves a favour...)

It uses a lot of CPU but that's not a problem for me because I will hardly be using the computer for anything else whilst mixing.

I find it easy to use, the graphic representation of the decks is perfect, and it is very stable & dependable. Sometimes crashes when you pull the needle back once a tune has finished, to play the last few seconds again. Also, when you set a track to loop, sometimes it eventually skips a few beats or bars. Could use a little polish but I appreciate that this is freeware.

The only real problem I have is that the eq's only cover two decks, so mixing with three or four decks, you will not be able to play with all the eq's. Apart from this, it is very easy to mix on three decks. You can 'line up' the next couple of songs in advance on the spare decks, then just switch the eq routing once one of the current tracks has finished. Easy!

I have concentrated on the problems I have come accross whilst using the software, but in general I think it's amazing. I can't believe that there are so few positive reviews of this software. Go and have a look at their website if you're still unsure.