I will vouch for this media. They work great!
Here is some hardware info and disc info on them:
I 00:37:38 Destination Device: [1:1:0] _NEC DVD_RW ND-3550A 1.06 (F:) (ATA)
I 00:37:38 Destination Media Type: DVD+R DL (Disc ID: RITEK-D01-01) (Speeds: 2.4x)
First line is the burner I'm using, and the second line is the memorex media, which as confirmed by someone already are Ritek.
I have used them about 25 times, and all success. They work great, and the 360 laser does not seem to have a problem reading them. I dont hear any of the clipping sounds often heard when media is being difficult to read.
I have also tested this with 3 different 360s. 2 of them with hitachi drives (47dj) with the latest (to the date of this posting) firmware. And also my own samsung Ms25 with latest ((to the date of this posting) firmware. 4.2b if I can recall.
I use my Ms25 to read, and XBC as the program, and IMGBurn to burn, no editing of the settings, just opening the .dvd file that already has the layerbreak info.
The media was the cheapest I found at my local store. 25 pack for $34. I was never into going with the "norm". I like to give the cheapest things a chance. And only fall back on the "quality" discs if need be.
This may not be relevant to the subject, but during the PSX days, I used the GQ brand (GQ stands for Great Quality lol) CDR media, when everybody swore by the TDKs (you all remember those days). The GQs were significantly cheaper and worked like they were truely as their brand suggest; "Great Quality". How do they hold up? About a few months ago, I brought out the old trusty PSX, I believe it was the 7000 series. Busted out one of the GQ discs, and worked like the original day I burned it, with no problems in loading, or lense clipping.
Of course the optic gurus will shut my statement down, by doing quality tests, but my test of it works and plays, its good enough, might be also good enough for others as well.