The first poly (hybrid) I had ever used was the Prince Let R' Rip. I was a teenager when it came out and I knew nothing about strings, just knew that I was snapping Prince Synthetic Gut Soft 16 (and they stopped making it) every other day in my Prince Precision Response Ti.
http://www.stringforum.net/stringdb.php?show=242
Really didn't like it, but it was durable. It hits like a cardboard.