I have two of the one mile units that have performed flawless for me. They have updated the application and removed any useful target shooting application from device. I have spoke with them several times and they were promising they had a new app coming to fix issues. This week I spoke with customer service and they told me it is a hardware issue and the new system would fix it. They stated they would replace my systems with new. Now they want me to pay half and I still can't see how new hardware fixes a shitty app. I would be even more unhappy if I spend more and end up with same issues.