I have to stress, that people with normal MD's should NOT buy this item, thinking it would work on your system it doesn't!
The disc holds a massive 1GB (1024MB) on the same size as the original disc, which originally only could hold about 150MB, it holds more information then a CD-R!
If you are thinking about cost to use ratio well then lets see, this product is just under £5 for this you not only can fit upto 45Hours of almost CD quality music, but you can even store your own personal files, pictures, videos, or what ever!
What would you rather have? a disc that is easier to control and only cost £5 per disc, or spend about £15.99 per blank SD card for only 512MB (half a gig!)
Yeah these are a little bulkier then SD cards, but they are more cost effective.
But the main feature is the storage of these cheap discs, yeah £5 per disc may seem steep
But 45 Hours of music on one disc is a lot!
But for those who are a little short on cash, why not get a normal MD and use the HIMD format on that, you will double the size of the disc (5 hours becomes something like 10 hours).
Either way, a must buy if you bought a HI MD recorder.