I'm happy with my power mixer system so far.  It works well and I have a couple of accessories.  I may have to buy a couple more (e.g., break hooks).  It works well so far and I'm happy with it.  The big challenge is that it's pretty heavy to hold, so anything that calls for 5-10 minutes of mixing is a little difficult.  It's heavier than my last mixer.  On the other hand, it has more features than my last mixer, so that's probably why.