Feature:
What more can you ask for? You have the capability of 4 decks, plus an easy switch out to "real" vinyl. You have truly QUALITY effects available.

Quality:
I see absolutely no issues in the quality of the build of the TSP system. It feels very sturdy.

Value:
It's a bit higher than I'd like, honestly. However, considering the quality of the build and the product, I don't have any true issue with the price.

Desirability:
It's a beautiful system, with a lot of customization that can be done. To say that it's pretty is an understatement. Even the A8DJ interface box is sexy.

Sound:
I love the sound quality of the A8DJ. It's FAR superior to most other timecode systems on the market, including Serato. It tends to be a bit more bass heavy than some other systems that I've used.

Ease of Use:
The interface is fantastic, but takes a bit of time to get used to. Plan on taking a few hours to get used to it and to set it up exactly to your liking.

Support:
I have to vote this down a bit, as Native Instruments themselves don't tend to answer very quickly or easily. However, some points are gained because of the community and how readily answers are available from them.

Overall:
I don't foresee myself looking for another option for a number of years. Serato served me well for 3 years, and I expect that the TSP will likely double that. My system stays connected in a home studio, for broadcasting, but I believe that it's very road worthy as well. It has, honestly, made me approach DJ'ing from an entirely different way. I'm forcing myself to think further than just the next record, and playing off of my audience much more.