We have about 30 sanders ranging from Porter Cable, Ridgid, Bosch, Dewalt, Makita and a host of others found at big box stores. I'd trade them all for the 4 Festool sanders that I own. Box store sanders will burn out within a week of heavy use, (8hrs/day), whereas 2 of my Festools were purchased about 5 years ago and have stripped thousands of lineal feet of paint.
We do buy the Bosch (non)-anti-static vac hoses when we don't need the anti-static function, since a 13' Bosch hose typically costs 25% of what Festool charges and their connectors are 100% interchangeable. For a professional, I know that Festool is a better value, for me at least. A diy'er or even just an enthusiast, I'd say probably not though.