Man yeah... it is by far the BEST. I have used them all too. The learning curve is the shortest, its intuitive to the Mac platform (ie, if you can run a Mac, you can run powercadd) and I believe it is the cheapest out there per seat, which if you ever hire someone, or several someones, this becomes very important.
however, you MUST get Wildtools and the DWG translator, these are so necessary to functionality its not even funny. Yeah, you can run basic powercadd, but those two add ons make the world of a difference.