Source: Ian Blyth
Ian gives a clear evaluation of System Center Capacity Planner for OpsMgr 2007.
“I can say now that I am very disappointed with it and can’t see me using it at all even if it is the official sizing tool.”
The only thing I can say, I’ve used it a couple of times to check my own designs with the results of SCCP. Just have a look if it’s a useful tool for you or not.
Here is a link to the System Center Capacity Planner Download Catalog.