I've have a few finishing sanders and even another Porter Cable but this little gem beats them all hands down.  I'm a professional woodworker and saw a fellow wood nerd using the Speed Bloc.  It looked like a relic and was pretty beat up.  I asked him about it and he started to rave about how awesome it was.  I picked it up for a minute and was immediately sold.  His Speed Bloc was 20+ years old and still worked like new.  I bought my own a couple weeks ago and have been in love ever since. It's incredibly smooth and feels great in my hand. It's very powerful and can shape wood beautifully. The foam backing pad is really thick and plush so it can handle corners and edges without squaring them.