These guys were super. What a great experience!
On Behrend, go all the way to the end in the cul de sac, then turn and Dyson will be about the 5th door on the left.
(I turned early into the complex, as soon as I saw the "2501" building number, so I had to crawl past dozens of other shops, watching the suite numbers decrease from 75 to 15 (they're in Suite 15).)
I think they'd have finished it in 15 minutes, but I had to rush off to an eye dr appointment; it was ready when I came back.
Really impressive customer service skills and demeanor. :-)