Reliability experience Norton Ghost 15?

Hello,

 

I have spent the last 3 days researching and trying various software packages for backing up my entire Windows 7 drive.  What I noticed is that NG is faster than all the other products I tried.  Where others take 2 hours or more, NG takes about an hour.  Makes me wonder if I'm missing something in setting up NG.

 

NG 15 is the oldest software of all the ones I tried.  Should that be a concern? 

 

I want to make sure that I have a reliable product since I plan on using NG on 6 office computers.

 

Would appreciate any feedback in helping me make the right choice.

 

Thanks!