I have been a member of seatjunky for several years now. It was formally fillaseat. I do hate that they don't have an app anymore but they are saying there will be one by end of year. As far as reviews on here saying there aren't any good shows anymore, wait until September 2017 and the start of fall season. Shows are VERY slow coming during the summer months. Phoenix Symphony is on hiatus during the summer. Just got tickets for the new fall season tonight threw seatjunky for Phoenix Symphony plays Rat Pack. Looking forward it it. I feel in the years we have been members, we have seen amazing shows that have more than paid for the membership fees.
UPDATE: APP IS UP AND WORKING!