Must a agree,might be the easiest,least expensive canada goose call to use,"The flute",back in the 70-'s and 80's our calls sounded like someone killing a cat rather than a goose,I bought a Big River back in the mid 80's (wood),1st call that sounded like a goose! Then came a champion caller (Tim Gesch) that modified a olts 50 flute,1st time we herd double clucking on a call,over the years I/we still bring out our Big River call hunting great/lesser canadas,it has a nice deep sound and really easy to use.BTW don't get hung up on calling to fast or double clucking as a rookie,hell if ya sit back and listen to a field full of honkers you'll find out that they don't make a hellofa lot of noise let alone double cluck in the fall,must be a mating deal in the spring,all the clucking and double clucking,not so much in the fall,but some guyz still crank off the double clucks and all kinds of sounds figuring they think they can sound like a flock or some such thing.
Practice your greeting,long range call,working birds a steady cluck/honk works well for canada's,wary birds will sometime decoy best with no calling as they approach,let the birds tell what they want,a good spread,concealment and flagging are sometimes your best bet as long as everyone in the spread does'nt peek or move their gun around before the birds drop they're landing gear.
Just a few thoughts~
Over the years I picked up a few short reed calls, zink and grounds build great calls,late season when birds are migrating and been shot at alot, we found that a different sounding call helps alot,pitch and volume and a sound that everyone within a 100 miles does'nt have that call for us is the grounds triple crown in wood,man does that call have volume,kelly powers won the world championship with that call,hand tuned with broke in guts in every call they sell but its on the spendy side.
Another plus with the flute is you can work it with one hand wilst the other is on your shotgun....