Terrible! For being the 2nd most expensive carrier in US - just behind Verizon, this app functions horribly. You can tell that there was a lot put into it - as in time & effort. Good production, but it glitches 97% of the time. I can barely get to actually open and load the main page correctly. Usually, with good WiFi or data signal, after you sign in it just never ends up loading the main page. Let it sit and load for 30 min and nothing. However it's the only way now w/AT&T to get records.