It is one of my favorite backup software. Its much faster and reliable than the other softwares that i have tried. Its earlier versions were having problem backing up x64 bit structure but later versions are doing fine.
Room for Improvement:
Not much really. The only problem that i face while using this software is that the backup taken using its older versions do at times create problem while being restored with new versions. So what i believe is that there is something missing between different versions which cause(occasionally) the later versions not to restore the images taken by the earlier versions.