I own about $30,000.00 (yes, $30k) worth of Festool tools, and have been using them professionally since I took that plunge in 2009.
It has become a love-hate relationship.
To the OP, the Domino 700 & 500 are indispensable tools for us, and worth their cost, but as with all Festool tools, must be handled carefully, and should be unloaded prior to warranty depletion.
These tools are without equal in so many ways, except for the all important DURABILITY & the fact that no matter how carefully you treat them, they are going to fail and require expensive warranty service or expensive replacement parts on a regular basis .
FESTOOL tools WILL NOT HOLD UP TO PROFESSIONAL USE
and even if a failure is covered by warranty, at "no cost"
a failed tool, which you depend on ALWAYS costs us commercial users, and often these (indirect) costs far surpass even the outrageous high price of the Festool tool itself!
The Domino system, is used on every job we do now, and is something I have come to depend on for our normal operations.
keep in mind, you need the entire "system" to get the most out of these. (and any other Festool)
you'll need all the overpriced extras -accessory attachments (fragile as well) dust extractor, and full selection of cutters + domino tenon stock.
Wish I had more time,, I could go on... & I'd love to throw up some YouTube videos showing all the brokedik Festool scrap from our toolroom.