Well, it's tsu as in tsunami, which is CLOSE to sue, but not quite. You can still hear the t in tsunami. So, there's that.
And to me, tay is the redneck, southern accent, "WANNA WATCH SOME TAY-VAY (TV)?" kind of tay. Fuck the english language.
So don't worry, I'm positive I'm pronouncing it right, vocally. (I studied a little japanese) What's throwing us off is how I express it with text and how you interperet it.