I find the use of the words "Professional" and "AVCHD" in the same phrase to be a real misnomer, but that's not what you were asking.
There is, as of now, no native handling of AVCHD in any OS X video editing software - including all versions of iMovie - so all the footage you import will have to be converted and take up a lot of space. It'll work, but it's more time, effort, and hard drive space consumed (and low space footprint is really the biggest advantage of using AVCHD)
I also really think AVCHD is to be avoided and recommend against that camera for that reason, but I'm only going to go into that if you ask for more detail.