I just ordered PME tips in sizes 0, 00, 1, 1.5, and 2 to use with the Ez Tracer that has a stand that was built by a person with a cake/cookie shop. Cost me 103.75 for the stand, so I am looking forward to begin to make cookies with my new tracer and from what I can surmise these tips are much better than Wilton's.
I was able to purchase the tips at a 40% off discount yesterday from a sight called Cookie Creator. I am excited!!!!!!!!
You will love the PME tips, especially if you are going to do string work. Love mine. I got a set through Amazon a couple of years ago.