I have been booking everything on a laptop in the room and just using my phone to check wait times. Trying to do anything else through the mobile app is pretty frustrating. The navigation and workflow is terrible.
The timing thing sounds way to tricky to pull off consistently. The performance of the mobile app is so bad that I can't imagine spending all day with my phone in my face trying to beat the system. My daughter and I did BTMRR 30 min SB, I was on the app the entire time in queue trying to swap FP+ for the afternoon. I was never successful, not even close. I gave up.
I just read through one of Kenny's blogs, wish I would have read it sooner, but it sounds pretty similar to our experience. FP+ combined with FP- has been awesome this trip we have done more FP than ever and very, very few SB lines. We have just been going around grabbing FP- for what we wanted with KTTW. If it gives me a pass, not my problem... In fact if you didn't read these boards, you wouldn't even know it's not intended.
Also, they are getting more restrictive with the FP times, we had to plead our case a couple times after showing up like 10 mins late