Microsoft Download Manager is really not up to it. Even FTM does really work only for technet/msdn. For MDM, can someone tell me how do I download windows 8 dev preview. Pasting the link gives error and reconnect and error and so on.
I use IDM as well for several reasons: fast downloads mutlipel downloads downloads of movies directly and more! For FTP i use 3DFtp which also has an build in accelerator and is also faster than any other! Also Payware, worth the money!