If you like the sound of the Line 6 HX series of effects then this could be a great pedal for you. Yes, it only does one effect at a time but it does most of them very well. It's like a Leatherman or Swiss Army knife for your pedalboard. I think it's a great fit for a cover band gig. I bought one to put in front of my amp for various modulation and pitch effects. I don't use them enough to justify the board space or cost, but when I need them I'd like them to sound good. The HX One does that job very well. It's not perfect, but it's incredibly useful.

Sound
The effects are all right out of the Helix series so if you are familiar with them and like the way they sound, you will be right at home. In my opinion about 90% of the bazillion effects Line 6 has are musical and useable. Some of the pitch stuff is still a little behind, but still passable for live use. They also include the "legacy" effects that are in Helix

Features
The Flux feature looks promising but I haven't spent too much time with it yet. It's not as gimmicky as I was expecting I will say that. Editing is all done on the box and it's pretty straightforward. The preset management is well thought out. They allow you to limit the number of presets in the 'rotation' so you don't have to scroll through 128 if you only use 7. There is a Preset manager PC/Mac app that allows you to rename and reorder but not edit. I also like the versatility of the input/output… read more options. It can be ran in line on your board in front of the amp, in mono 4 cable method, or you could technically put your drives in the HX One effects loop so it could be used before and after drive pedals on a direct to front of amp style pedalboard.

Ease of Use
Most of the effects are usable as they are but editing is very easy. You can run just about all the effects in stereo which is nice.

Quality
By all appearances it's made very well.

Value
I bought mine on sale, but even at MAP of $300 it's a great value. The HX series of effects is mature and stable and updated regularly. You are buying into a platform that has been proven over the last 8 years. The only comparable pedal I can think of is the Eventide H9 which is still twice the price and limited in other ways.

Manufacturer Support
I've only dealt directly with Line 6 a few times over the last 20+ years and they were helpful. They also have a sponsored user forum full of people that are willing to help you out.

The Wow Factor
I think this pedal will best suit traditional pedalboard/amp users who could use a really good Jack of all trades pedal to fill out their sonic palette. If you already have a Helix or other digital modeler this really doesn't add much. The one exception might be an HX Stomp user who could use that one extra block for DSP heavy effects

Musical Background:
I've been playing since the 70's and still kicking around in local rock bands because it keeps me young!

Musical Style:
Rock, prog, CCM read less