A good reliable e caller is worth the 600.00 IMO, one that will work and keep on working is something I look for in an e caller, I also like one that has plenty of volume when needed in open country! I have a Minaska Big Country and it is great, you can add any sound you can format to MP3 and it also comes with 100 sounds and they have more on there owners only forum free for 1 year. Back them up on your computer or a CD and your good to go no matter what. The CF card is easy to add and delete sounds from and yes it will call in coyotes for sure! They will be comming out with more sounds and new products in the future since there partnership with Mad Call AKA Flambeau.