I am still testing it on different devices - iPad, iMac, iPod etc...
This fixed layout epub is very nice for the formatting - keeps all the formatting, but there are 2 problems - it is only landscape and the hyperlinks are not working
actually it looks like PDF somehow - you can't increase/decrease the font in the iBooks app
For the portrait/landscape there is an option during the export - but I didn't quite understand it - weather you could choose only one of them, or there is an option to turns it afterwards in the app?
And the hyperlinks are going to be fixed in the next version of InDEsign?
Still I think that this fixed layout epub is a major step forward