I have tried lots (but not all!) of them.
I've had tremendous success running 2 different calls from 'Talkin Stick' game calls. A4 reed Split -V in the topreed called the Black Beard (black tape and thin green latex), and a 3 reed split-V called the Vixen (orange tape (smart idea! and green latex - this one gives a higher pitch)the only thing I can't do on it is kee-kee but any old 2 reed without a cut will work for that. Very nice yelps, cutts, cackles, whineseasy for me to control pitch and volume and the purrs...............they have closed the deal several times in the last 2 years and despite my poor treatment they last a long time as well. On my 4th right now but I have 1/2 dozen for back-up.......just in case you know.
Check em out if you are a like me and have spent a small fortune trying to find the one that works just right;
http://www.talkinstick.com/