I'm sorry to say that my experience with Ritek Ridata G04 has not been good at all -- and it really disappoints me after the truly overwhelming positive reviews on the media. I bought a 50-pak for Ridata 4x a few days ago. Right off the bat -- the first disc off the top of the spindle failed to play in my DVD (Toshiba SD-K620)after a successful burn (Lite-On 4x DVDRW). The next disc was successful, but the one after that failed. After 8 discs, I had 4 coasters -- a 50% failure rate. Totally crushing. And they're G04's, alright -- I verified this with DVDInfo Pro. I'm exchanging the unused discs today for the Princo 4x's. The Princo's have performed better for me -- very surprising after reading the mostly lukewarm to negative reviews on the media. I remember reading in another thread that Ritek had a period where they were releasing sub-standard product into the market, but I can't remember the timeframe. I'd like to get some thoughts on this.