I have used around 400 + of these particular CD-Rs now and find them one of the most economical and reliable CD-R disc available.
The Company Memorex has been going for a number of years. I even remember them as a kid making good old fashioned tapes. They are a mid range buyer level more than anything else.
The Discs are suitable for anyone who wants a permanent media to store data on. -R means write once allowing you to only write the information to the disc once. Although some software programs support multi session allowing you to add data to the disc.
I use a lot of CD-R discs. So I needed a disc I could rely on to store my data safely, to have good read/write ability with multiple burners and players and be light on my pocket. I think I have definitely found this with Memorex CD-R discs.
They are 700MB or 80 Mins standard single layer discs and are 52x in speed. One of the fastest speeds on the market. Most modern recorders support this speed however some are slower. The discs still work with a slower burner but are limited in write speed to the recorder being used. They come in packs of 25, 50 & 100 discs in a cake layer box. I personally pay £6 for a box of 100 and consider them a good price for what they are. Other more expensive manufacturers may provide you with a jewel case.
My experiences with them are as follows: I use them regularly for reading and writing. The data I store on the discs are applications, Photos, Mp3/Music, Video and documents.
I have tested them in Pioneer, LG, Sony and Liteon Burners using Nero Burning Rom as my choice of burning software. I have never experienced any problems with burning at all. With a 52x in speed disc and compatible recorder writing process is very fast and using the full capacity can take less than 3 mins to burn.
I have tried them in various computer drives and have never had any problem with reading any data from the discs.
With regards to stand alone DVD players I have tried the discs on Sony, Panasonic, Toshiba, TEAC and Samsung Players. Again I have had no problem with data being read from the disc. Video and Mp3 playback have been perfect.
I have tried them in various CD players, Sony, Technics, Panasonic, Teac and Kenwood with audio data on them and they have produced good results every time.
I have had some of the discs for quite some time. I do look after my discs and I can report that they have not degraded in anyway since the original burn. My brother who often uses discs in his car stereo gets them scratched and they seem to be fine with light scratches on too.
I really can't fault these bargain basement discs at all for quality or reliability from my experience with them.
They are widely available but personally I buy mine from either SCAN computers or the local market.
I would certainly recommend them. They are a great cheap form permanent reliable storage. As with all media I would check your firmware is up to date on your drives to ensure the best compatibility with these discs.