I would recommend these if looking for good tonality, but less technicalities than a wired that are comparable in price. If convenience, the size of the iem, and easy portability, and given it's big price, the ANC matter a lot to you (if you are in noisy areas most of the day on the go including flights, trains, etc..). It's priced the way it is due to the technology with ANC. There's nothing in it's class that can really compete besides the Sony XM3, but it's bulky and mic isn't as good, although I think both mics are crappy compared to wired.
Other alternative iem with ANC is a wired one from Bose QC20 that I've mentioned earlier. Which is also pricey even if it's been out for a long time now, and it's due to ANC technology I take it.
You have to try ANC to find out how useful it is. People just shrug it off thinking their iem can isolate the noise just as well. No.