I own it and like it quite a bit. It's a nice length and is very smooth even with a fair amount of weight. $299 (was) a great deal. The hi-hat is pretty much a necessity, as are a sturdy set of C-stands or apple boxes to support it. No complaints - it's not the quietest slider out there, but certainly not disruptive, even during interviews. Recommended for (balanced) camera rigs up to maybe 15 lbs.
Just bought the Slyder off videogear.co.uk for those of you in EU land... the discount that might have been back in december isn't there anymore, but the price tag in the UK is actually cheaper than importing the slider from DJ themselves.