I've been using Foxpro e-calls for the past 10 years. Two 416B's, two FX3's, and one FX5 The only problems I've had have been poor remote range on an FX3, and a broken battery wire inside the FX3. I was told to elevate the call, which worked, but was not really feasable when hunting flat open soybean stubble fields. I just learned to live with it. Foxpro repaired the broken battery wire for me when I had the call updated to an FX5. Since then I've started using a Foxpro wall charger and Foxpro rechargeable batteries, so I no longer have to remove my battery tray to recharge batteries. Since upgrading to an FX5 I no longer have remote range issues, and the call is much more responsive to inputs from the remote.
All in all, I've found my Foxpro calls to work as advertised, and of high quality. Foxpro has taken care of the few problems I've had with no hesitation.