Same to you in about to buy a multi effect, I talk to people, go shop by shop, it seem line to be best option, but for something messy like heavy music some one experienced told me of another brand which I don't wanna talk on line forum about...
But to help you find what's in it. Let tell you I found fx way cheaper, it, itself says I have less feature
But it came with some feature I'm not sure if it exist on pod hd, what I did. Was to take android version of software, so as a friend said it don't tie you with iOS. And take look around it, it is single line unlike what pod software shows in images, I mean it's more like a mono device which sound goes in go through same cycle event of it is stereo, while pod shows and talk about configuration different sound and effect for your left and right, or if you wish join them, due that you can also have two amp, as I check fx has lot of cabinet sampling, you can set many parameters per effect depends on effect model and type, there are effect that can link together by parameters not just input output, and the feature that I just told at begin which I'm not sure if exists in pod model, is that you can play a track in your phone, and it find matches to the music toward what all other people configured, so you have access to all kinda preset effect in one device if you are not going to craft your own sound...
I don't know if pod had this, but surely it's pro, it's tested and made it to top... And etc...