Unlike many others, I hated the Contact Detach (Sure-T) sets. Even using the 6 ml cannula, I found them to be quite painful. I was amazed at how long the needle was.
I may have had a defective box of sets, but found that the adhesive on the anchor piece worked great, but the adhesive on the actually insertion piece was not strong enough and I had to use tape.
I used one box of ten sets and would say that at least 50% were uncomfortable. I am thin but not outrageously so. But having pumped for over 12 years, I have never found a 90 degree set that was reliable and painfree for me. I always go back to manually inserted Comfort Shorts (Silhouettes).
YDMV.