I first heard from their H.R. department (later it turned out there's a separate Candidate support role, too). That conversation went well, and led me to the Stryker-focused Gallup poll. I found this somewhat uncomfortable (it's a phone interview, took me about 40 minutes, trying to ascertain your service, assertiveness, and passion, and then ask for specific examples, basically), Which I passed; I guess about 10% of people pass, at least for the Endoscopy department.
From there, I've gone through two rounds of in person interviews; several individual interviews each time. Met twice with the head of Technical Publications. He had lots of standard questions, and gave me a manual to look at and give opinions on, which I thought was a good tactic.
I liked pretty much everyone I spoke with! Everyone seems involved, and likes to work there, and likes the people there. Some are practically evangelists for the company, which was a bit disconcerting.
Second round I met more people outside the writing group; regulatory, engineering management, etc. Only slight glitch was the head of engineering was a bit offended I hadn't worn a suit (which was on the advice of friends; I don't think anyone else I interviewed with even noticed).
At this point, I am waiting to hear back from them.