I've got the original ones which are brilliant if not a little bulky to carry about all the time. I think they sound pretty awesome. While I'm still rocking a 6+ it won't be an issue when I upgrade to a 7 and beyond that may pose an issue. Given the wired headphone cable is removable and replaceable I'm sort of hoping they come out with a lightning version... but then that might just be wishful thinking.
Are you looking at the wireless version or the wired ones. Thewireless looks like it has some nice features including the ability to use a wire
Day to day I'm still using a pair of aJays Four I originally got through a group buy on MacTalk, although they packed it in after a couple of years so I bought a replacement set through Officeworks. Again a pretty good set of headphones to my ears.
For my wireless needs I have a set of Plantronics Backbeat GO 2's. These sound almost as good as the aJays and I love being cable free. I charge them at work during the day then use the for home and back to work on my hour-ish commute. If I walk to and from the station it's more like 1.5 hours each way and I can get the low battery warning if I've also used them for a few calls of a night at home. That said, they have never run flat so I don't know how long they go after telling me the battery level is low.
I do get interference issues walking through Melbourne CBD (it's been suggested it's when I'm near the tram lines which makes some sense). I also find the wired set do much much better as a microphone when I'm making calls while walking around outside (or so the person on the other end tells me). Making calls at home seems to get less complaints.