I use PW all the time. It is very handy in cases where Disk Management has it's limits (e.g. with partition shrinking). You are, however, well advised to always make images of ALL partitions on a disk where you do partition manipulations.
I once lost a whole disk with 4 partitions full of data because I had made a small mistake with PW (and I thought I was an experienced user of the program). Fortunately I had all my images and could easily rebuild the disk. Such an incident may not happen very often. But when it happens it can be devastating if you are not prepared.
PS: "Support Windows Dynamic Disk" - Rick, they took that out of the freebee after release 4.2.2. But you can download the 4.2.2 ISO from here (pw422): https://skydrive.live.com/?cid=b0a22789320e3247&sc=documents&id=B0A22789320E3247%21215