The Sonic is a flat putter with a line of grooves around the outside rim. It uses sonic technology to stick to the chains and ensure that difficult putts are made. Okay, I made that part up, but that’s what the picture on the disc looks like it should do.
If you like the feel of a traditional Frisbee, the kind you get for free from insurance agents, then you’ll like using the Sonic as your putter. The Sonic is a little “flimsy” feeling for me, and with the way I hold discs for putts, the thumb grooves don’t do me a lick of good. This disc is an absolutely straight flyer though, and will fade less than just about any other golf disc.
Here’s a professional review of the Sonic provided by Summit Sports: