Great thing for computers which has no DVD drive or ability to boot from USB ..
For computers with no DVD drive or the ability to boot from the USB try Plop: http://www.plop.at/en/bootmanager/index.html
If you have a USB port, a USB pen and the ability to boot from the CD or floppy you can use Plop to boot from the USB. You only need the CD version if you don't have the USB port, a large enough USB pen or Plop fails.
You don't have to waste a CD with only Plop (it's very small), Parted Magic has Plop (and Clonezilla, etc) on the boot menu and is a good addition to your toolbox. With Plop you should be able to boot any distro with a USB pen even if your BIOS doesn't boot form the USB. You don't need to burn the CD for the distro you want to install so you save on CD's and becomes irrelevant if you have a CD or DVD drive because you can install both with Plop from a USB pen.
The advantage of the CD version it's that is a smaller download, should take less time to install, take less disk space once installed and depending on what you removed from the DVD version it could use less RAM and be faster. Good for older computers, specially if you install and use a lighter DE or WM on top of MATE.