I like my FiOS and I like my 360 but the FiOS app on the 360 is completely pointless.
You don't have nearly as many channels on the 360, you can't record, it's a slower interface, no on demand (if anyone even uses that), and you get nothing extra for using the 360.
When I first booted it up and saw that they were showing me Cinemax and HBO, I thought I would finally get those channels and could actually watch Game of Thrones when it came on, turns out I still had to subscribe to see those channels.
I was hoping to see some record option so I could lessen the burden on my already cramped DVR and move that onto my 360 with plenty of space...nope.
I was hoping I could just use an easy voice controlled guide, what I found was a guide with about 20 channels (most of which I don't even watch) and that's about it.
I was incredibly excited when they first announced the FiOS app hoping I could stop using my Verizon DVR but sadly that app was a let down in every way possible.