Glad to see this thread has some interest
My point was to find out if the Festies are better than other air sanders on the market, but here are my 2 cents about the air ones, and air tools in general;
When I refer to air sanders, I refer to the industrial ones. In most cases, the automotive lines are below the industrial lines of the manufacturers. Do not confuse the $60 pneumatic sanders available at the big stores and auto stores with the industrial ones. It is like comparing a Rotex to a Ryobi [big grin]
The magic of the industrial sanders (in my experience the Dynabrade Spirit) is in a few areas;
Size- The thing is so small, if it was any smaller it would be hard to hold. It is like a sanding pad coming out of your hand. The absolute best if you like creative sanding and shaping.
Speed- At 12000 rpm, very low vibrations if any. The pad just flies.
The Dynabrade I know has a few versions, no vac, self generated vac, and external vac system. Not sure if the dust collection is as good as the Festool one (That is amazing).
Air motor- That is a pleasure to run. The energy is actually created in the compressed air system and is not a part of what you hold in your hand. Sounds great as well [big grin]
Very few moving parts, and very few parts in general.
I warmly recommend to check the Dynabrade catalog to any tool addict. They have many unique sanding solutions for odd shapes and uses. It is on their site to download. I also own a Dynafile 2 kit that is a mini belt sander capable of running belts small as 1/8" ! (and thicker ones too).
Compressors are not such a big deal, you can get one fat enough for $1000 or less at the large Home Depot style stores.
Having air pressure at the shop is great for blowing dust, cleaning tools, etc. You know that blow after sanding before staining that no rug can do..
I do steel work as well and have some amazing pneumatic grinders (Cleco, Atlas copco). These are built from the same steel as weapons (So each is also a hammer [big grin]). These can go for $800 for a small 4" depressed center wheel angle grinder and you do get what you pay for.
I would love to discuss these if anyone here is interested.
i to have a few dynabrades and can say some are 10yrs old and still the most light and easly adapted to contours and odd shapes the festool lex are a flat surface tool
do to the mobility of the hose but as for dust well what dust [blink]