If we get into a vote, I've had ZERO synchro soft issues...yet, have had iLok issues with both the iLok 1 and now 2. I had to break out diag tools to diagnose and fix my own ilok2 issue...which it turns out affects every install of Win7 that is not actively on a network. 2 months after I reported in detail the problem and fix, I got a note today that they're writing up a knowledge base article.
Anyway...i bought an iLok 1 for a single app--caused config issues in XP years ago...bought a 2 for a second app and while I ultimately fixed it for them, it caused the software I bought to not actually work for the first week or so of ownership. Time that should've been spent mixing was spent diagnosing and resolving the issue. Not to mention the time it takes Waves vintage series to open. Yank the iLok while you wait--it'll barf...that's what its waiting on.
Two strikes. Ask me if I'm ever going to buy anything else that goes on an iLok. I vote hells no.