We just bought a Tizzi about a week ago. The dog loves it. It is a bit more interactive than the other Zogoflex toys since the "legs" can be crossed and uncrossed. The small hole in the "head" is great for putting a small treat in - although it is sometimes very difficult to get out.
Great toy. All of the Zogoflex toys are amazing. We need a Jive and Zisc to make our collection complete. We've had a Hurley for a few years and a Tux nearly as long. They withstand everything.